I'm with TankerTrash.
First came across kerky in the Hastings crew room at Lindholme. The kerchy school would open the moment the crew room filled up from morning prayers. As aircraft came up and people left, others would take over. 6 hours or so later the game would still be running, different people but still running. People like Merv Parry and Dolly Grey.
At 5 the school would relocate to the bar where the old salts, or whatever you called old truckie drivers, would continue with the odd phone call from one of the wives "your dinner will be in the dog if you don't get home NOW."