There are plenty of pizza places that serve hot subs or calzones. Having a wine bar that also has whiskey isn't unusual. An item not being in the name of the restaurant is fine. But "vegan" isn't really a food item, it's a cultural/religious choice. It'd be like having a baconator as an option at a Jewish deli: Technically, nothing says they can't, it just seems VERY out of place.
There are plenty of pizza places that serve hot subs or calzones. Having a wine bar that also has whiskey isn't unusual. An item not being in the name of the restaurant is fine. But "vegan" isn't really a food item, it's a cultural/religious choice. It'd be like having a baconator as an option at a Jewish deli: Technically, nothing says they can't, it just seems VERY out of place.