The Knicks might as well have been on the famed Venice Beach playground courts Thursday. Arriving early in Los Angeles for their four-game road trip, the Knicks staged an unstructured practice at UCLA and let the players essentially scrimmage without coaching or critiques or stoppages. It allowed for a free-flowing workout with a pickup-game-on-the-playgrounds feel. It wasn’t exactly a practice out of “Wizard of Westwood” John Wooden’s playbook. The run-and-gun affair was a result of having three straight days off after Monday’s Golden State loss and enduring a rigorous practice Wednesday after which the team flew cross-country. And lest we forget, the Knicks, losers in 10 of their last 11 games, are now playing out the string with 20 games left, facing the Clippers at Staples Center on Friday. The players essentially picked their own sides and had fun.