I've discovered the secret of invisibility.....go to this Famous Dave's!
My wife an I went there last night before taking in a movie. We were seated quickly, no waiting for a table and the place was not that busy. We sat looking at the menus, deciding what we would try on this visit. We made our decisions and realized that nobody has even come by to ask for drink order. We watched as waiters and waitresses came to the other tables. Never a glance in our direction. Another table got seated and a waiter showed up to take their drink order. We realized it had been over fifteen minutes since we were seated without anyone acknowledging us. So we decided to test the boundaries of our new found invisibility. I brought the menus and silverware back to the person who seated us. Let them know about our discovery of invisibility. They didn't care enough to address the issue. So out the door we went.
I'm glad Dave is so famous that he can ignore his customers.
I hope on your visit the wait staff can see you.