The BB King is a mixture of blues, Motown, rock and a couple other genres.
The Rolling Stone Lounge is rock, but the style varies by the talent they have. On a recent B2B cruise, they went from mostly medium 70s rock (think Eagles, BTO, Stones, etc)to a bit more metal (think AC/DC and similar) when a new lead singer was added at the turnaround port. On our cruises, there was a lot of dancing in both RR and BBK venues.