Review of Burger 21

I asked for a gluten free burger. She said, "we don't have gluten free burgers, only gluten free buns." I tried to ask her why, was it cross contamination, or what? It is on their menu. Why would you have a gluten free bun with nothing to put on it? She just kept barking, "we don't have gluten free burgers, only gluten free buns!" So I walked away.

Celiac friendly?

No