I have a selection of Ray Charles ballads on a CD that I throw in. I also like soft old-school early-bop jazz, especially with a woofy tenor saxophone -- not Kenny G or "smooth jazz" sizzly porn soundtrack beat-box shyt: I mean Turrentine, Dexter Gordon, Ben Webster. Put on some Turrentine (on vinyl -- it sounds good with the slight pops and hiss), drop the needle on "Someone to Watch Over Me," take her drink and set it down, and slow-dance in your living room. If you think this is gray-hair shyt, I've knocked the socks off of wide-eyed coeds with this. Recently. Refinement FTW.
There's also a great series of CD comps made in the late 90's, uptempo trance stuff with the occasional sampled moan. I've been burning CD's of it for so long I forget the name of the comps, though. It was a Volume I, II, & III.