Ian's Pizza specializes in orders by the slice, and had at least a dozen different options ready at the counter the day we went. I would've tried more than one kind, but they didn't have any vegan slices ready the day we went. The person working the counter told us that they do occasionally have vegan options available by the slice.
Some of the pizzas could be made vegan, and the menu suggested two in particular. We ordered the Lasagna Marinara, which was great. It had a marinara sauce, lasagna noodles, Daiya Mozzarella, a mock parmesan, and fresh herbs. The other vegan suggestions was the Mac n' Cheese.
They didn't serve alcohol, but the atmosphere reminded me of a college bar where they are worried about patrons trashing the place. There was a comic book theme that started in one corner then gave way to a huge piece of ugly and half-destroyed modern art. The layout was awkward as well forcing customers to simultaneously hover over a table and be in the way of the soda fountain while waiting for their orders.
Our pizza was creative and really good, and offering Daiya scores points with me. Better atmosphere, and a mock meat or tofu option is all it would take to make this an excellent place for vegetarians.
Update: Ian's has tofu! It's probably good, but I wouldn't know as they sort of gave us one option and tried to get rid of us quickly. They told us to come on Mondays when it's vegan night... Apparently, they don't put much effort into catering to vegans the rest of the week.