Yes, Y do. I am spaniard (as in the old way) and I saw them in the Lobsterpot Club too on July, 1969, and they shocked me. It was an amazing concert, because we (me and my little spanish friends)never heard live music like that in our isolated country. I enjoyded a lot, really. Afterwards, I never heard anything about them. Google is all.
Specially, I remember the great percusionist playing a lot of strange elements but making a real great rythm.