There was a similar thread somewhere on this site last week, so I'll copy my reply onto this one too. Here's my playlist, quite a bit different than the above list, for some R&B and jazz influenced pop music and some acoustic stuff... Really sets a nice mood.
Alicia Keys Diary
Billy Paul Me and Mrs. Jones
Brian McKnight Backseat (Gettin Down)
Damien Rice The Blowers Daughter
The Dramatics In The Rain
Everything But The Girl Before Today
Gato Barbieri Europa
India.Arie Ready For Love
The Isley Brothers Between The Sheets
Janet Jackson Moist
Joe All The Things (Your Man Wont Do)
John Legend P.D.A. (We Just Dont Care)
John Mayer City Love
Lyle Lovett Ill Come Knockin
Maxwell
Til The Cops Come Knockin
Mazzy Star Fade Into You
Michael Franks (feat. Peggy Lee) You Were Meant For Me
Michael Jackson The Lady In My Life
The OJays Lovin You
Prince Insatiable
Quincy Jones (feat. Barry White, Al B. Sure!, El Debarge & James Ingram) The Secret Garden
R. Kelly (Sex) Love Is What We Makin
Red Hot Chili Peppers Slow Cheetah
Robin Thicke I Need Love
Ryan Adams How Do You Keep Love Alive
Sade Flow
Simply Red Its You
Sting Sister Moon
Sufjan Stevens To Be Alone With You
Teena Marie My Bodys Hungry
The Whispers Say Yes