I live in Reston, play guitar, but I have yet to go to Jaxx.
There have been some shows that I've wanted to see there, specifically Kings X played there a couple of months ago, but there always seems to be a conflict with my schedule when there is a show I want to see there.
Plus, unfortunately shows usually end well after my bedtime. As you get older, your bedtime seems to get earlier *sighs*. If I'm going to stay up late enough to see a show, it's usually a bigger name act at a place like the 9:30 club in DC.