I used to be all for 'em.
The following things must be considered:
You might get attached to her. (Less likely)
She might get attached to you (more likely).
The room for drama is huge with booty calls. They always start out innocent, and occasionally there are people that can keep it strictly business... but usually it leads to some serious complications.
Also, often times women who are "booty calls" are insane. When you decide to call it off, they'll become enraged with jealousy and out of nowhere become attached to you. It seriously leads to bad news when you find someone you actually want to date.