The group I was with went twice during our recent trip-both because of the great piano player/singer, Brian Kraus (sp.?). Both times was a late afternoon/early evening and he had the crowd into it.
The bar itself is fine. If you get a table you're set and the service was good. It's right in the middle of the place and I recommend going on Friday and/or Saturday between 3 and 7 for a similar experience to cap off your day and/or to start the evening.