Frank's, which has been mentioned, but also a place further east on 175 at 2846 Jessup Rd. I used to go before it had a name (or I hadn't noticed), but looks like it's called Duvall's Marketplace.

I think there's some parking lot pop-ups near the Long Gate Shopping Center, NE corner of 29 & 103. I think 1 is set up in the YMCA parking lot and another at the Armory, next to the Fire Station.