Does anyone know if what was termed Rock Steady was also called Blue Beat?

I recall visiting a Jamaican Club in London in the 60's, drawn in to a smokey, low ceiling, dark basement grotto by a hypnotic rhymthic dance music. When I asked what the music was, I was told it was called Blue Beat. No vocals, just a record sound system of rhythmic instrumentals.

I was too young and naive (she's from Canada eh) to realize at the time, that myself and my partner were the only people in the club who weren't Jamaican and that was the reason for the quizzical stares. Music will do that to you.