Saw JJ and Kai back in the late 50s on a UK tour. Front row seats, what a sound those guys made. Next saw Kai in London with the Giants of Jazz. We were sitting in a pub waiting for the concert to start and in walked Kai, Blakey and IIRC Al Mckibbon for a between set break. They were in good spirits but as we couldn't afford to buy them a drink we left them undisturbed. Something I regret now.