Royale is not very vegan friendly, as some reviewers have already said, but I'd love to add my own gripes. Many of the waitresses employed don't understand what vegan is. The burgers come with Aioli - an egg based mayonnaise - and the buns are egg glazed (why they're so shiny). The gluten free buns are supposed to be vegan but taste like cardboard, or the waitresses will try to argue you into eating the egg glazed bun by insisting it's vegan. This has happened on more than one occasion.
The patty that comes with the royale veg is quite lovely, however, so have that without the bun. Order an extra patty if you please, they aren't that pricey as an extra. Two yum vegan patties instead of cardboard buns sounds like a better deal to me.
The side salad comes with cheese so make sure you specify that it must have none. But don't expect anyone to really hear your request.Pros: Vegan patty is delicious, Central location
Cons: cliquey, unfriendly waitresses, gross bathrooms, vegan unfriendly