Concerts COLLEGE OF SOUTHERN MARYLAND CHOIRS -- The Concert Choir and Chamber Choir are on tour starting tomorrow. 7 p.m. tomorrow at the Jaycees Community Center, 3092 Crain Hwy., Waldorf; 5 p.m. Sunday at Calvary Baptist Church 8330 Crain Hwy., Upper Marlboro; and more performances through Dec. 18. Free. 301-934-7828, 301-870-3008, 301-934-7788 (TDD) or www.csmd.edu/events/finearts/index.

CHESAPEAKE CHORALE -- 7 p.m. Sunday. A choral Christmas concert. Emmanuel Baptist Church, 3800 Old Town Rd., Huntingtown. Free. 301-855-8686.

LEONARDTOWN HIGH CHORAL DEPARTMENT -- 7 p.m. Tuesday. Several choral groups will be featured at the Winter Concert. Leonardtown High School, 23995 Point Lookout Rd., Leonardtown. Free. 301-862-2078.

CHRISTMAS OPEN HOUSE CONCERT -- 6 p.m. doors, 7 p.m. concert Wednesday. St. Maries Musica sings traditional hymns and carols in costume. Seating is limited. Historic St. Mary's City, Rosecroft Road off Route 5, St. Mary's. Free. 240-895-4990 or www.stmaryscity.org.

Dance AQUA SQUARE DANCING -- 7:30-9:30 p.m. every Friday. The Aqua Squares Square Dance Club of Calvert County holds a dance at the Southern Community Center, 20 Appeal Lane, Lusby. $5. 410-326-2676 or 301-373-2207.

MERRY-LANDERS SQUARE DANCING -- 7:30-9:30 p.m. every Friday. Dances are held by square dance club the Southern Merry-Landers, at John Hanson Middle School, 12350 Vivian Adams Rd., Waldorf. $5.50; members, $4. 301-893-1974.

Exhibits AIDS QUILT -- 10 a.m.-5 p.m. Monday and 9 a.m.-noon Tuesday. Four panels of the NAMES Project AIDS Memorial Quilt will be on display. The opening ceremony includes opening remarks from a representative of the Health Department. BI-113, Center for Business and Industry, College of Southern Maryland, La Plata campus, 8730 Mitchell Rd. Free. 301-934-7554, 301-870-3008, or 301-884-8131, Ext. 7554.

CHRISTMAS SHOW AND SMALL PACKAGES -- 11 a.m.-6 p.m. Wednesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Dec. 24. The main gallery hosts the 16th Annual Christmas All-Member Show, while the Mulberry Fields Room is devoted to works sized 8-by-10-inches or smaller. North End Gallery, 41625 Fenwick St., Leonardtown. Free. 301-475-3130 or www.northendgallery.org.

MAIN STREET GALLERY'S 11TH YEAR -- 11 a.m.-5 p.m. Wednesdays-Fridays and 11 a.m.-4 p.m. weekends, Saturday through Dec. 23. "Spirit, Creativity and Surprise" features works by Parran Collery, Yvonne Creighton, Fanchon, Jerry Hovanec, Bo Jia, Diana Marta, Ruthann Uithol and others. Main Street Gallery, 486 Main St. Prince Frederick. Free. 410-535-3334.

20 YEARS OF CARMEN'S -- 10 a.m.-5 p.m. Tuesdays-Saturdays and 11 a.m.-3 p.m. Sundays, through Christmas. All gallery artists have been invited to submit one new work especially designed for this anniversary exhibition. Carmen's Gallery, Dowell Road, Solomons. Free. 410-326-2549 or www.carmensgallery.com.

CARLTON FLETCHER -- Noon-5 p.m. Mondays and Wednesdays; 3:30-7 p.m. Tuesdays, Thursdays and Fridays; and an hour before CSM performances, through Jan. 26; gallery talk with artist, noon Tuesday. A retrospective of drawings and paintings by Carlton Fletcher. Tony Hungerford Memorial Gallery, College of Southern Maryland, 8730 Mitchell Rd., La Plata. Free. 301-934-7828, 301-870-3008 or 301-884-8131, Ext. 7828.

HOLIDAY SHOW AND SALE -- 11 a.m.-4 p.m. Fridays-Sundays, through Dec. 15. Various artists represented. Mattawoman Creek Art Center at Smallwood State Park, Sweden Point Road, Marbury. Free. 301-743-5159 or www.mattawomanart.org.

Lectures and Literature "TRAPPING ATOMS, MOLECULES, AND LIGHT" -- 4:40 p.m. Wednesday. A lecture by Charles Sukenik from Old Dominion University. Schaefer 106, St. Mary's College of Maryland, 18952 E. Fisher Rd, St. Mary's City. Free. 240-895-4380 or 240-895-2095.

ANTHROPOLOGY LECTURE -- 4:30 p.m. next Thursday. Christine Eber from New Mexico State University talks about her recent field work in Chiapas, Mexico. St. Mary's Hall, St. Mary's College of Maryland, 18952 E. Fisher Rd, St. Mary's City. Free. 240-895-4380 or 240-895-2095.

ALL THINGS PROVENCE -- The Books and More club cooks and discusses French literature. Bayhill Market, 7544 Bayside Rd., Chesapeake Beach. Free. 410-257-2411.

Theater "A CHRISTMAS CAROL" -- 8 p.m. Fridays and Saturdays, 3 p.m. Sundays, through Dec. 15, plus 3 p.m. Dec. 14. Port Tobacco Players present the Dickens classic. Port Tobacco Players Theatre, 508 Charles St., La Plata. $12; seniors and students, $10. 301-932-6819.

TWIN BEACH PLAYERS -- 7:30 p.m. tomorrow-Sunday and Dec. 6-8. Calvert County Cultural Arts Council sponsors performances of "The Littlest Angel" and "The Gift of the Magi." Surfside South at Herrington Harbour, 2153 Lakeshore Drive, Rose Haven. $15; in advance, $12; seniors, $10; students K-12, $5. budthecat@chesapeake.net.

Miscellaneous CALVERT COUNTY HOSPICE FESTIVAL OF TREES -- 7-9 p.m. tomorrow, 9 a.m.-9 p.m. Saturday and 10 a.m.-6 p.m. Sunday. Holiday music and entertainment, with more than 60 decorated trees and holiday vendors. All proceeds benefit Calvert Hospice. Patuxent High School, 12485 Rousby Hall Rd., Lusby. $4; seniors, $2; children, $1. 410-535-0892, 301-855-1226 or www.calverthospice.org.

FESTIVAL OF TREES -- 4:30 p.m. Sunday, sing favorite holiday songs and enjoy hot cider and homemade goodies while decorating trees; 7 p.m. Tuesday, local school groups and Santa provide entertainment at the tree lighting ceremony. Village Green Pavilion, Indian Head Highway, Indian Head. Free. 301-743-5574.

HEARTH AND HOME IN EARLY MARYLAND -- 10 a.m.-5 p.m. tomorrow and Saturday. Demonstrations and hands-on activities show how Maryland's first settlers celebrated the end of the harvest season. Historic St. Mary's City, Rosecroft Road off Route 5, St. Mary's. $7.50; seniors and students, $6; children 6-12, $3.50. 240-895-4990 or www.stmaryscity.org.

ST. MARY'S COUNTY FESTIVAL OF TREES -- 9 a.m.-9 p.m. tomorrow, 9 a.m.-5 p.m. Saturday, and noon-5 p.m. Sunday. The Leonardtown Volunteer Rescue Squad Auxiliary sponsors a display of decorated trees, wreaths and stockings, which will be auctioned on Sunday afternoon. Bell Motor Company showroom, 22675 Washington St., Leonardtown. $1. 301-475-2209.

LEXINGTON PARK HOLIDAYS -- 5-8 p.m. Sunday. Lexington Park lights up the night at its annual Lighting of the American Freedom Tree and Holiday Festival. In addition to a tree display, the town offers entertainment, a life-size gingerbread house, visits with Santa and a "76 Trombones" parade. Food and beverages will be available from vendors. Millison Plaza, Lexington Park. Free. 301-475-6636.

HOLIDAY OPEN HOUSE -- 1-4 p.m. Sunday. Volunteers and friends of the museum host a holiday celebration. Chesapeake Beach Railway Museum, 4155 Mears Ave., Chesapeake Beach. Free. 410-257-3892 or 301-855-6472.

CHRISTMAS PARADE -- 2 p.m. Sunday; rain date, Dec. 8. See marching bands, floats, antique cars and Santa Claus. Fox Run Shopping Center, Route 2/4, Prince Frederick. Free. 410-535-0026.

WEEKLY AUCTIONS -- 6 p.m. Fridays. Chesapeake Auction House, 5015 St. Leonard Rd., St. Leonard. Free. 410-586-1161, 800-286-0033 or www.chesapeakeauctionhouse.com.

Plan Ahead

HANGING OF THE GREENS -- 1-3 p.m. next Thursday. Calvert Garden Club puts up greens as a Christmas gift to Calvert County. Courthouse Square, Prince Frederick. Free. 410-326-3776 or 410-257-5081.

ATLANTIC CITY TRIP -- Jan. 5-7; payment due Sunday. A trip to Atlantic City, N.J., includes motor coach, two nights at the Trump Marina Hotel Casino, $30 coin rebate, a breakfast buffet, surprise gift, and a New Year's-style celebration at the Historic Renault Winery with a champagne toast, open wine bar, dinner and dancing. Bus makes pickups in Hollywood and Waldorf. $175, based on double occupancy. 301-884-8728 or 240-925-0801.

-- Carrie Donovan

The Southern Maryland Extra Entertainment Calendar lists events as space permits. Mail announcements and photos -- noting date, time, address, cost and phone number -- to Carrie Donovan, Southern Maryland Extra, The Washington Post, 1150 15th St. NW, Washington, D.C. 20071. You may also e-mail announcements to donovanc@washpost.com or fax them to 202-334-5417. Deadline is 14 days before publication.