Mellow Mushroom is a neat idea. The restaurants always have cool themes and a fun environment. I have only eaten at the bar here and it's always been ok. The bar space is large and roomy. There are cool lava lamps set up to look at and huge tvs.
The customer service sucks. The bartenders I have had are always rude. The food orders take a long time. They seem unapologetic about it.
The food is pretty good, never a complaint. I like the pizza and calzones (light ricotta) are decent.