Mellow Mushroom is a perfect place for late night food when you're lit with friends, but I'm not sure if I would recommend it for a nice formal dinner, even if you're craving pizza. We had the "constant karma" pizza, with tomato and a pesto sauce. Unfortunately, the pizza was pretty soggy after the heated cheese and pesto sauce mixed, and so it was difficult to eat the pizza, even when using a fork and knife. While I do appreciate a good pizza that stays simple to tomato + basil combination, the flavors just didn't pop for me, on top of being difficult to eat.
* the caveat is I wasn't drunk when I had this, so maybe the experience is enhanced when not completely sober. But for those of you who are straight edge, Fired Pie across the street has some better customizable and fresh pizza.