I thought I would suggest these I'm not sure if they are what you are looking for.
Buffy is a stripper in both.
Siren's Song by Seredipity
http://www.sinister-attraction.net/stories/s/sirens.htm Summary: Fantasy: Buffy is an exotic dancer, Spike, a wealthy lawyer. He wants her, but does she want him? Complete
It's just my life by spikegirl
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=16610Summary: Buffy was in love with Spike since she was 12. He and her brother Xander took off to LA. When Buffy's mother died she was left to take care of her sister and became a stripper. What will Spike do when he sees Buffy, Buffy and her daughter?Complete