I was immediately treated like a second class consumer since I had a child, the waitress ignored simple requests and when she came to our table it was only to slam things down and make rude faces.
I ordered steak fajitas. The waitress put the sizzling plate in front of my son, the steak was covered in at least 50% fat, I had to ask for a steak knife to trim it off. When I asked for the knife the waitress again set the knife directly in front of my son. The next 10 minutes I pulled huge chunks of fat and muscle off of the meat.
The manager was considerate enough to comp the meal, but only after I showed him the plate full of fat and told him my experience (during which the waitress called me a liar in Spanish, assuming I didn't speak the language.)