Dances.
Can you be a bit more explicit?
Ballroom
To the best of my knowledge, the rules of this game merely require a one-word response. That word may or may not be related to the previous word.
So to your offering of “ballroom,” I might respond with:
Calculus.
Carry on, from “Calculus.”
tartar
Think he means, “Fuck that fucking comedian, that fucking plastic surgery disaster, he’s so fucking annoying I’d love to see him hang from a fucking rope by his fucking family jewels,” – explicit enough for ya? 
In play (from “tartar”):
Sauce.
Sorry to continue the hi-jack, but what is Carrot-Top?
In play:
cheek
Carrot Top is a red-headed stand up comic. Not everyone likes him, but I did get a kick of him making Ann break out laughing on a celebrity episode of The Weakest Link. (She asked him if his hair was naturally red, and he replied: “Well, the carpet matches the drapes, if that’s what you mean.”)
In play:
nerve
dendrite
Dentyne.
Note to self: do not commit contempt of court in Elendil Heir’s courtroom; appears to have a … rigorous … standard of punishment.
Colgate
(Christ, can’t you guys play nice while I’m gone? Wait 'til your father gets home!)
Irma
Bombauer
Bombenhagel
Bombay
Rum
Gin.
Sapphire
Emerald
City