This place is a damn good place to come get a cheap drink in Old Town. Considering that the place is always packed, the bar tenders at the two bar areas manage to service everyone promptly so you really can't go wrong coming here-you WILL have a good time.
My most recent experience was the same experience I ALWAYS have. It was our last stop after a night out and unfortunately it is always this final stop that ensures that I will hate myself when the sun comes up. Good time, nonetheless: the holiday festivities were in full swing, it was wall to wall people, and the drinks were a-flowin'. I was forced to do Fireball shots so that pretty much sealed my fate. Someone hugged the white wishing well in the men's room (not very well at that!) so taking a leak was pretty unpleasant. Somehow however, this was strangely fitting for the turn that the evening took.
So to summarize, Coach House is the Old Faithful of Old Town. You'll find a fun crowd, cheap drinks and a non-pretentious atmosphere. You'd have to be a bit of an asshole to come here an not have at least a little fun.