Louis' is a restaurant that offers fast-food style Greek sandwiches/pitas. I have no idea if the bathroom is accessible because I've never stayed long enough to use it. I normally go to Louis' when I want a take-out chicken souvlaki on a pita. I prefer Louis' to its neighbour, Messini. I don't think there are ANY vegetarian or vegan options other than maybe french fries?
If you're on the Danforth and looking for a quick, cheap, souvlaki pita that has meat, try Louis; you won't be disappointed.