When my friend Kim saw a four-person dinner at DBGB pop up on GiltCity for $150, the first thing she thought was, “SUNDAE!!” And the second thing she thought was, “Can I eat four sundaes by myself?” And the third thing she thought was, “Guess I have to invite Katie.” I’d had a very so-so experience the first time around at DBGB, but my subsequent tasting menu at Chef Boulud’s flagship restaurant, Daniel, was so outstanding it changed the way I rate all other restaurants; naturally, I was interested in a second try at DBGB. So Dr. Boyfriend and I met Kim and her friend Kelly on Friday night to…