I've never done one of Conte's rides. Based on the commercials they ran on Versus during the TdF, they're trying to position themselves even more as a shop for racing than they used to be. (That's assuming the Bethesda store is still owned by the people who own the Arlington store, which just changed its name to Fresh Bikes.)

But based on the ride description, I'd say it's worth giving it a try. If you don't feel like they are welcoming to someone who rides at your pace and abilities, you can always just not do it again.

I will say that I'm finding the folks in the Oxon Hill club to be very friendly. If you don't feel that their ride starts are too far away, you might give them a try. www.ohbike.org.