Originally Posted by Mr. Jinx
My experiences are far closer to yours than Mr. Dump's. Mostly with the security, traffic management, ticket takers than with any particular vendors though.
I look at those as 2 separate things. The vendors are generally pretty friendly because they are working for tips. Everyone else who is not expecting a tip is generally kind of a prick.
The vendors are generally more cordial, but they tend to be incompetent (or at least painfully slow), which kind of sours the transaction. (EDIT: By vendors, I was thinking the concession workers. You're right, the guys walking the seats are great.)