[SomeRandomUser]

Maybe you're rude too so you can't tell how the waiter should be treated. /joke

I've never eaten with someone who was rude to a waiter, but there are some things that you can learn from a person by looking at how he behaves with other people.

For example, if someone is putting food on your table, try to not be in his way and maybe tone down the conversation a little bit. Saying thanks is also a nice thing to do... looking at you, study team member.