Friday events:
Warren County Historical Society, 210 Fourth Ave., 8:30 a.m. to 4:30 p.m.
Warren Public Library, Market St., Warren, open, 10 a.m.-5 p.m.
Retired women of GTE Sylvania (Osram), lunch, Cable Hollow Golf Course, 1 p.m.
Chatauqua Squares, western-style square and round dance, cafeteria, Southwestern Elementary School, Lakwood, N.Y., 8 p.m.
Warren Public Library Teen Photography Contest, Wetmore Gallery, Warren Public Library, regular library hours.
Music in the Park presented by Northwest Savings Bank, "Power Play," Soldiers & Sailors Park, Hickory St. at Pennsylvania Ave. W., 8-10 p.m., weather permitting (www.cityofwarrenpa.gov).
Second Annual Art Auction to benefit Majengo Orphanage, with speakers Lynn Connell, Matt McKissock, Ian and Becky Ashbaugh and Terry and Rose Ashbaugh, Warren Holiday Inn, 6:30-10 p.m. (723-2495)
Allegheny Burger Festival, live music, food, arts, crafts, Betts Park (723-3050).
"Careers in NW PA Orientation," CareerLink, 24 Market St., Warren, 11 a.m.-noon.