We ordered pizza from Round Table last year while staying at Hojo. It was in the little hotel literature area with the phone number for delivery.
It was pretty good, and we had plenty to munch on for the next couple of days too. We are definitely considering ordering it again while on our vacation next time!
Whata Lotta pizza is definitely cheap, and actually not bad. The Euclid location is closest to DLR and I'm pretty sure they deliver (we always pick it up).