Some of the HILARIOUS things I do and say at work --
When someone compliments the food I serve: "Thanks, I made it myself."  (this was funnier when I didn't actually have to 
cook the food.)  
When a little kid orders a Pepsi: "Can I see your ID?"  
When delivering drinks to a little kid: I deliver them their parents' beer and say, "here's your Busch Light, Sir/Ma'am."  And then when they react I look confused, and then I say, "oh, I'm sorry, yes.  You had the Whiskey 7."  And then when they react I look confused again, and then I say, "oh, I'm sorry, yes.  You had the Shirley Temple."
When someone accidentally sees me in the bathroom, elbow-deep in the crapper, gloved up, toilet scrubber in hand: "Oh I'm sorry, I'm in an important business meeting.  I'll be right with you."
When someone accidentally sees me mopping the floor: (Here I break into dance.  Think RUN RUN RUN RUN, alternating feet stomping, running in place.  Then I break into song:)  "She works HARD for the money!  So hard for it honey!"
More to follow.  I'm constantly working on my act.