Ahhhhhhh, yes. The classic Washington DC issue. There's a city, there's Virginia, and there's Maryland. There's a bunch of bridges, a river, some traffic and a Metro that's great
if it goes where and when you need it. For folks coming in from out of town to IAD or DCA, trecking to Bethesda for D&B's may be a bit out of the way. Heck, for someone in VA it's out of the way...
Gotta admit that my one experince at D&B's was not a whole lot of fun... we spent a lot of time getting to Bethesda and then people played games. Sure, you can drink and/or eat but the place is not too conducive for socializing.
Now, Buffalo Billiards at the Dupont Circle metro stop... that's another story.