Funk/Reggae/Soul experts needed

I suppose your right in some respects, I've DJ'd weddings and It always drives me nuts that I could slap on the funkiest mind blowing tune that no one had ever heard of, but there would always be someone who would ask if I had anything they could dance to? or Do you have any James Brown? I don't get it? Isn't good music good music?

The majority dance with familiarity- if they aint heard on X factor they aren't very open to using their ears.
You cant go wrong with anthologies from:

Stevie Wonder,
James Brown,
Soul 2 Soul,
Jackson 5/Micheal Jackson,
Curtis Mayfield,
Cool and the Gang,
Prince,
Aretha Frankin,
Jamarioquai,
Marvin Gaye
Lionel Ritchie
Diana Ross
Fugees
Macfadden & Whitehead "Aint No Stopping Us Now"
Rick James "Mary Jane"
Etta James "I Just Wanna Make Love to You"
Jackie Wilson "Your Love"

Mixing it up with slightly lesser known stuff:
Omar "Essensual"
Mark Ronson stuff
Sean Escoffery"Days Like These"
10cc "Dread Lock Holiday"
Leon Ware "Why I Came To California"
Jeff Mills: The Kat Moda EP

Hope these help.