I think I've written about this before, but please pay attention to your server!
Last night, a table of two ladies (that weren't mine) were staring at me. I went over and asked if they needed something.
"Can you get our waitress?"
"Well, is it something I can do for you?"
They wanted me to heat up a dish. Fine, I did.
Later on, they were staring at me again. I go over.
"Are you our waitress?"
Uhm... no. Your waitress is a middle-aged brunette and I am a 20-something blonde.
How can you be so unaware of your surroundings, or put servers so low on the totem pole that you honestly think anyone in an apron is the same person?