Glad of being helpful. Here's another suggestion:
http://www.youtube.com/watch?v=T4G-8M_jutk
Equally down tempo, easily danceable... the tune is a Prince's composition.
Another tune that comes to mind, which is a nice one and should be easy to dance to is Lately by Stevie Wonder. However the lyrics are a bit sad:
To end this bunch of suggestions, one tune titled "Alma de blues" (Blues soul) by a Spanish group named "Presuntos implicados", one of my favorite Spanish bands. Maybe a bit long. It has the advantage that few people will understand the words , but for sure will be quite unheard there: