Try telling the players "No thanks, I am full."
To be serious, when this situation arises, try to re-introduce yourself to the table crew instead, or start taking your jacket off, or whatever works. With your back to the players, they might realize that you are busy and move on.
If it is something that really bothers you, bring it up in the pre-game, and discuss how the crew would prefer to handle it.
Like you said though, don't be a turd about it.