D.C. has more than its fair share of trendy tapas and martini bars, and it’s fair to say many of them can feel a bit stuffy and overdone. Despite its cutesy name, Tapatinis doesn’t endeavor to be anything more than it says: solid tapas and strong martinis. A modern, artsy décor makes Tapatinis feel more sophisticated than most of the Capitol Hill bars. The atmosphere is relaxed for weekend...