I'm a big fan of the rooftop in the summer- great vibes but very busy. It would be very easy to enter the restaurant and not be aware of the other floors- I was dragged along by friends, so I'm lucky to know about the top floor. I've only been for drinks, so I can't rate the gluten friendliness --but I'm excited to go again. If you're looking for a fun atmosphere for late night drinks, I highly recommend it!