Pa. Singing Group Opens, Bluemont Concert Series

The Bluemont Concert Series will open its 1990 Sunday Courthouse concert season with a performance by Big Nite Out, a Philadelphia group featuring three female vocalists. The concert, at 7 p.m. Sunday on the lawn of the Loudoun County Courthouse in Leesburg, is the first of nine scheduled this summer. In case of bad weather, concerts will be held at Loudoun County High School and the decision will be broadcast over local radio station WAGE after 5 p.m. A $2 donation is requested at all concerts. Call 777-6306.

Sky Meadows State Park Events

This weekend at Sky Meadows State Park: a silhouette cutter at work from 2 to 3:30 p.m. Saturday; a campfire with songs and marshmallows from 8:30 to 9:30 p.m. Saturday; and rag doll making from 2 to 3:30 p.m. Sunday. All events are free; parking is $1.50. Call 592-3556.

'Celebrity Waiter Dinner' Planned

Loudoun County's third annual "Celebrity Waiter Dinner," to benefit the Loudoun chapter of the American Heart Association, is at 6 p.m. tomorrow at the Dulles Marriott. Diners will be served by local politicians, school and county officials, doctors and businesspeople. Waiters will donate their tips to the heart association. The event begins with a cash bar, followed by dinner and an auction. Admission is $30. Call 444-5900.

Waterford Art, Antiques Auction

The Waterford Foundation will hold its annual art and antiques auction at 2 p.m. Sunday at the Old School in Waterford. Proceeds will go toward restoring and refurbishing the school, which the foundation hopes to use for a national center for heritage education. Admission is $10, which includes parking and a wine and cheese reception. Call 882-3018 or 478-8454.

Hospital Weight-Control Class

Loudoun Hospital Center will offer a free introductory session for its weight-management program, Lifesteps, at 7 p.m. June 28 at the hospital. Call 771-2856 or 478-1801, ext. 2856.

Preservation Society Awards

The Preservation Society of Loudoun County will sponsor its sixth annual awards program at a lawn party from 4 to 7 p.m. Saturday at Shelburne Glebe, an 18th-century estate near Lincoln. The awards party will be the last gathering on the property before parts of it are developed for estate homes. Admission is $30. Call 338-2343.

Recycling at Seneca Ridge

The Seneca Ridge Middle School recycling center will be open from 8 a.m. to 4 p.m. Saturday. Bring aluminum and tin cans; certain plastics; cardboard; green, brown and clear glass; and newspapers. Call 450-6443 for information.

Hearings on County Complex

Two public hearings on the proposed new county government complex will take place at 7:30 tonight at Park View High School in Sterling and Tuesday night at Blue Ridge Middle School in Purcellville. Call 777-0202.

Children's Movie Day at Library

The Sterling Public Library will sponsor a free movie day Tuesday for children entering grades 1 through 5. There will be sessions from 11 a.m. to noon, noon to 1 p.m. and 7 to 8 p.m. Call 430-9500.

Center Offers Oriental Meal

The Loudoun Valley Community Center will sponsor a meal of Oriental food prepared and served by county teenagers at 6:30 p.m. tomorrow. Admission is $4 for adults and $2 for children 12 and younger. Call 338-4122.

Coffee Hour at Church

Senior adults are invited to attend a coffee hour at 10 a.m. June 28 at the Catoctin Presbyterian Church, Route 665, Waterford. Representatives from the county's Parks and Recreation Department will be on hand to discuss plans for new senior adult activities in Waterford. Call 777-0657.