You put music in categories because you need to define a sound, but when you don't play it on your so-called radio stations that claim to be R&B or jazz or whatever... All music is dance music. But when people think of dance music, they think of techno or just house. Anything you can dance to is dance music. I don't care if it's classical, funk, salsa, reggae, calypso; it's all dance music.
House, rap, R&B, disco rock, they are all part of hip-hop culture. Why you ain't playing Kraftwerk along with Jay-Z? That's hip-hop.