JT Walkers serves omni American fare for the most part, but it really is easy to find options there.  As well as flexible management and an executive chef willing and more than able to accommodate vegans, there are excellent menu options that--with only minor substitution--could be in your belly:

• The veggie sandwich!  JTW's has the best veggie sandwich I've ever had, you just have to remove the cheese sauce.  I like to add avocado.  It comes with shoestring or steak fries.
• Cheeseless pizza is actually something I really enjoy.  I like mine smoothered in onion and tomato sauce.