Ask for ketchup, jelly (if at breakfast), sweetner, refills. The CMs there are great, a load of fun and make you feel as if they really honestly love what they are doing. We love the Whispering Canyon!!
It also comes with a warning that you shouldn't be disappointed if all these things don't pan out. "But please use this only as a guide for possibly having fun and not a list of expectations!"
That being said, here are a few suggestions:
Wear a Hat or T-Shirt from Universal or Sea World
Ask your server where his 6-shooter is
Tell your server you spent the day at an attraction outside of WDW
Tell the server who's birthday or anniversary it is
Have your kids "egg him/her on"
Have one of the males in the group ask where the restrooms are
Challenge your server to a pistol fight and ask for a gun
Claim your straw is not long enough
Chew gum
Ask the server where you can buy some chewing gum in WDW