Missed this post earlier, but I'm in the neighborhood and would enjoy saying hello. With weather-dependent baseball and soccer schedules, and open houses on Sunday, I am not good at making advance commitment, but if you're willing to play by ear, I could maybe drop in wherever you are.
NRA headquarters is just down the road, and the museum (open Sunday 9:30 to 5) is worth a visit. You can also shoot at the range after passing a rules safety test, $20 per hour for a lane, $15 for each additional person. It will be open 8 to 6 Sunday (reserved after 6).
The cafe is closed weekends, but there is a slew of ethnic restaurants a mile south in Fairfax Center.