The 35 best things to do in D.C. this weekend and next week

The lives of Dolly Parton and Tim Curry are remembered with sing-along parties and film screenings over the next few days. Other highlights include the 50th anniversary of Anacostia Park’s beloved roller skating pavilion; fairs dedicated to works by female artists; and international festivals with food, music and dancing. Get outside with a movie at the National Arboretum, extended hours at the U.S. Botanic Garden, square dancing in Rock Creek Park, or rooftop happy hours.