You don't have to be inside at JoJo to absorb the jazz scene. The house band performs with its back to the big front window of this small bar and restaurant, so passersby on the street can enjoy the music without entering. But there are lots of good reasons to go inside, including a friendly staff and often stellar music. There's live jazz from 9:30 p.m. until 1 a.m. every night except Mondays and Fridays. Thursdays are particularly promising, with the Thad Wilson group holding down a regular slot. No cover. JoJo Restaurant and Bar, 1518 U St. NW. 202-319-9350.