CRAB FEAST CRUISE -- 4-6 p.m. Sunday. All-you-can-eat Chesapeake Bay blue crabs aboard the Chesapeake Bay Field Lab's skipjack, Dee of St. Mary's, with tomatoes, corn on the cob and cantaloupes. Bring your own beverage. Proceeds benefit the Chesapeake Bay Field Lab, Piney Point. $50. Reservations required. 301-994-2245, firstname.lastname@example.org www.thebaylab.org.
CPR/AED/FIRST AID -- 5-9:30 p.m. Tuesday and next Thursday. Satisfactory completion of course earns one-year certification in adult, infant and child cardiopulmonary resuscitation, automated external defibrillation and first aid. Offered by the Prince Frederick office of the Southern Maryland Chapter of the American Red Cross. County Services Plaza, 150 Main St., Prince Frederick. $42 covers all materials. Advance registration required. 410-535-5230.
MIX AND MINGLE AT VERA'S -- 6-9 p.m. every Wednesday and Thursday throughout the summer. Contests, prizes, second beverage half price, tropical waterfront dining, free entertainment by Lee's Karaoke and Sharon Marman on piano. Vera's White Sands Restaurant, Marina and Lounge, end of White Sands Drive on St. John's Creek, Lusby. 410-586-1182.
SOTTERLEY PLANTATION MANSION TOURS -- 10 a.m.-3 p.m. Tuesdays-Saturdays and noon-3 p.m. Sundays. Guided tours of the mansion on the 300-year-old former tobacco plantation and Colonial port. Sotterley Plantation, 44300 Sotterley Rd., Hollywood. Guided mansion tour and self-guided outbuildings and grounds tour, adults, $7; ages 6-16, $5; 5 and younger, free. Self-guided grounds tour only, $2. Group tours available by appointment. 301-373-2280, 800-681-0850 or www.sotterley.org.
LIVE SEAHORSE EXHIBIT -- 10 a.m.-5 p.m. daily, through Oct. 31. Seahorses from around the globe. Calvert Marine Museum, 14200 Solomons Island Rd., Solomons. Adults, $7; seniors, $6; ages 5-12, $2; 4 and younger, free. 410-326-2042, Ext. 49.
KARAOKE -- 8 p.m.-midnight Saturdays. Proceeds benefit local military veterans and charities. VFW Post 1800, Indian Head. 301-743-5109.
"IN HIS STEPS" -- 10 a.m. Sunday. One-man drama based on Charles Sheldon's novel about living life by one simple code, "What would Jesus do?" Performed by professional dramatist Chuck Neighbors. Nursery provided. Lexington Park United Methodist Church, 21760 Great Mills Rd., Lexington Park. Free. 301-863-8500 or email@example.com.
AUDITIONS -- 7-9 p.m. next Thursday and Aug. 20 and 10 a.m.-1 p.m. Aug. 21 for the Port Tobacco Players' "A Christmas Story." Adults and those ages 6-13 are needed. Children must come prepared with a memorized monologue of one to two minutes; adults will cold-read from the script. La Plata United Methodist Church, Routes 301 and 6, La Plata. 301-274-3592.
"THE LAST OF THE RED HOT LOVERS" AUDITIONS -- 10 a.m. Aug. 21. Black Box Theatre's production of Neil Simon's comedy. Need three women in late twenties to late thirties and a man in late forties. All roles are paid. Call to schedule an appointment. Indian Head Center for the Arts, Indian Head. 301-743-3040 or www.indianheadblackbox.org.
CHILDREN'S CHORAL AUDITIONS -- 10-11 a.m. Aug. 21. Newly formed choral ensemble, the Schubert Singers, for children entering second through sixth grades will perform in concerts, learn sight-singing, vocal production and part-singing. Group rehearsal followed by small-group auditions. Christ Church, Gertrude Mitchell Room, 112 E. Charles St., La Plata. More information is available from musical directors Angela Garvey, 301-934-2360 and Alicia Cordelle, 301-843-2503.
AFRICAN AMERICAN HERITAGE DAY -- Noon-6 p.m. Aug. 21. Event showcases Afro-American culture and history through reenactors, dance, storytelling, music, food, exhibits and displays. National Colonial Farm, Piscataway Park, 3400 Bryan Point Rd. Accokeek. $3. 301-283-2113 or www.accokeek.org.
CHARITY MOTORCYCLE RIDE -- All day, Aug. 21. A ride to benefit acute respiratory distress syndrome research at the Johns Hopkins University medical center in memory of Gary W. Chasles Sr. The ride will be from Southern Maryland to Ocean City and back. Cars, trucks, vans and buses also can participate. After-ride festivities will include live music and a cash bar, 6 p.m.-12:30 a.m. the Hotel Charles, Hughesville. Participation by donation. 571-233-1884, firstname.lastname@example.org www.ardsride.com.
NATIONAL FALLEN BIKER MEMORIAL RUN II -- Aug. 22, registration, 9:30-11:30 a.m.; ride departure, 12:30 p.m. Motorcycle ride starts in St. Mary's County and will go through Calvert, Anne Arundel, Prince George's and Charles counties to create public awareness about automobiles sharing the road safely with bikers. The ride honors all fallen motorcyclists and benefits a fund to create a national memorial. It will end at Charles County Fairgrounds with music, raffles, food, beverages, door prizes and entertainment. All American Harley-Davidson, 27967 Baptist Church Rd., Mechanicsville. $15 a rider. 301-893-2900 or www.fireupthundrout.com.
SPORTS SAFETY TRAINING -- 8 a.m.-5 p.m. Aug. 28. A session for coaches, trainers and athletes to learn training methods to deal with injuries and treatment of on-field emergencies until professional help arrives. Offered by the Prince Frederick office of the Southern Maryland Chapter of the American Red Cross. County Services Plaza, 150 Main St., Prince Frederick. $38 fee includes all materials. Advance registration required. 410-535-5230.