HELP: Can't Remember a Satanic Movie

A while ago I saw a Movie on Cable. Either the Fox Movie Channel or A Digital Movie Channel were showing a pretty decent (At least I think it was) Movie about Satan Worship. I don't remember any of the cast, the title and when I searched for it here... I was unsucessful. I may have imagined some of the plot but I do remember it vaguely. First I remember a Couple invited to a party at the mansion of a old man. At the party everyone was dressed for New years Eve or something but there were drugs and of course topless dancers (One on a Table?). This Couple somehow gets mixed up with Satanic Stuff and ends up fleeing to Mexico or somewhere in the desert. A scene later in the movie has the woman sitting in a pentagram drawing on the floor, topless. Can Anyone Help Me?, I'd really appreciate it. And If It turns out to be Devil's Rain (which I haven't seen) I feel very stupid.