The Pirate Bay - The galaxy's most resilient bittorrent site 

r and b
rac
ragga
rap
rapcore
rastafari
reflective
reggae
reggaeton
relax
relaxing
rent
rhythm and blues
riot grrrl
rnb
rock
rock and roll
rock argentino
rock argento
rock en espanol
rock n roll
rockabilly
romantic
roots
roots reggae
rousing
rowdy
russian