Elevator etiquette?

Just a random question I'm interested in, as I just got off the elevator at work.

Do you guys greet the people you ride in an elevator with? Like "hello" when you get on and "have a good one" when you step off? Does it depend on the number of people? Number of floors?

I build character!

I love how easy it is to make friends with little boys.

I explained to the son of a client what a urine sample is, and all he got out of it was that I had to touch (albeit through three layers of sterile plastic) pee. So I chased him around the waiting room as he screamed "NOOOOOOOO PEE HANDS."

Ten minutes later, we are now best friends.