for around 4 bucks all you can eat, Cici's isn't bad. there is one across the street from work (Bailey's Crossroads) and one 2 minutes from my house (Gaithersburg). however, I always tend to go when it is the most crowded...
not sure when the deals were, but I do remember hearing about local shops running out of pizza. i know now it's a free topping for each TD scored if and when they do the promotion.
in college, my fraternity (as a school group) had a deal with a local Domino's, Large 1 topping pizzas for 6 bucks.
I know Elliot in the Morning does a
Pick 5 promotion with Papa John's.
Regular pizza, I prefer PJ's over either The Hut or Domino's, however I'm a thin crust guy, and i think both Domino's and the Hut have better thin crust.
Plus, you can't beat the 555 deal...