MAGFest is a music and gaming festival at National Harbor, MD on January 2-5, 2014. http://magfest.org/
While the focus is heavily slanted toward console gaming, they do have a tabletop gaming area with games to use for free play, tournaments, and events.
I would love to run some Looney Labs gaming events at MAGFest, but I can't do it myself. If you are interested in running some events with me, please let me let me know as soon as possible. I'm flexible on days, times, and which games to play.
The panel submission deadline is October 31, and the form does allow you to block out times you are unavailable. I'm not sure if a gaming event is considered a "panel," but the form states that panelists receive free admission.
Hi there! I'm Nick and I'm on staff with MAGFest. We get plenty of people demoing their tabletop games, so you're definitely welcome to do it as well. No need to submit a panel, just show up, park yourself in the tabletop room, and invite people to play! You should probably give our tabletop guys a heads up, though, at firstname.lastname@example.org. Let me know if you have any questions!