The ONLY time I have ever been glutened by a restaurant. I had a burger with no bun, no sauce, 2 "gf" fries, and a margarita. The waiter who brought our drinks spilled some beer into my drink, so I explained the situation and he offered to get me a new drink. My "new" drink came out very quickly, so I think he may have not switched it out. I will not ever go back, too risky.
No