Stopped into the Rigby (in the former Casbah location) earlier today with some friends, and I think it has some potential. It just opened and it's a rock (mostly Beatles) themed bar.
It's a big space (3 floors) and they did a nice job decorating. The upstairs has a pub feel with a pool table and restaurant seating up front. They are currently converting the basement into a venue, which could be awesome with a dark, cave-like feel.
I tried some of the food - the philly cheese steak and the pork sliders - both items were overly bland and tasted like something I just microwaved. Sandwiches come with ripple chips. Unless they start serving french onion dip (yum), that's not going to fly in Madison. It was 2-for-1 sandwiches and apps, which is a great deal.
Service is good, staff was very nice. I think it's a good addition to the block (if they work on their food).