Sorry to fail you on your valentines day post, but sadly, I’m out on the IL/IA border. Nowhere close to Maryland. You might try a few other places, like The Session- they may have a local group in your area!
I know this thread is super old but if anyone is interested, there’s oltime jams every other tuesday at the five and dime bar on west 36th street. They have a slow and fast jam starting at 7pm. There’s also monthly square dances with live oltime bands just about every month at mobtown ballroom and various ticketed events and workshops super frequently around town.
On the off tuesdays the bar hosts bluegrass jam.