A couple of Fridays ago, some friends and I took the hourlong trip to an off-the-beaten-path dive bar in Nebraska – Bob’s Bar, in Martinsburg. It’s not much to look at from the outside. Even when you get in the place, it’s not that great – a pool table, a bar and some tables shoved together in the back. The plates are mismatched remnants of what seem like 1950s tableware, and the giant fan blowing in the back means quite a bit of…