I was assistant manager at a busy restaurant for many years...
One extremely busy Friday night, I was helping the hostess seat people. I sat a party of four and realized we only had one menu left. As I placed the menu in front of one of the young women and told the other three people that I would have menus for them in just a minute or two the three other people in the party began to chuckle.
I Came to find out that the person I chose to give the one and only menu to was blind!
That was the most embarrassing moment of my life I must say.
The people were great about it and said that it happened all of the time.