That sounds like an interesting premise, but having the word "booty" in the title is going to shoot that right down. It is an intrinsically silly word, which would really hurt the point you are trying to get across with the Cthulhu tie-in. Maybe 1-900-Cthulhu? But even then, the 1-900 number craze has been over for years. So yeah, I don't know.
Personally, I think "Booty Call of Cthulhu" has probably already been made and is either a tentacle-porn hentai or an extremely uncomfortable fetish video.