Living downtown, Pop Up Pizza has become our go-to pizza place (preferable to the much closer Radio City Pizza, but hey, Pop Up delivers, so it's all the same).
They are vegetarian and vegan friendly with vegan soft-serve and pizza. Their plain cheese is basic but tasty and they have a number of specialty pizzas, as well. I like the Goodman, which is topped with potatoes!
The garlic knots are amazing- do not skip them! While ordering delivery we were told we had to get a minimum of 10, which is a lot, but we ended up reheating them with leftover slices over the next few days and they were great even as leftovers! (I recommend freezing and then reheating for 10 minutes at 400 F.)
Anyway, it's nice to have a decent pizza place to order from nearby; don't be fooled by its weird location in the Plaza, this is good pizza!