The 30 best things to do in D.C. this weekend and next week

Celebrations for Memorial Day weekend and D.C. Black Pride include free jazz concerts, outdoor festivals and a chance to share a meal with strangers. After years of renovation, both the Smithsonian Castle and the Arts and Industries Building will temporarily reopen to the public, inviting visitors to explore exhibits and take guided tours. Also in the city, Lamont Plaza, Alethia Tanner Park near NoMa and the Dupont Circle fountain will fill with music and dancing on Saturday.