While last Saturday was a big day for K-Swiss because of the release of its sneaker collaboration with Partners & Spade, the Wednesday before that was also a big one. Hundreds attended K-Swiss’ “Play Nice” fashion show in New York City’s Skyline Gallery as models showcased products slated to release as part of the brand’s Spring 2010 collections. Several celebrities appeared on the runway, accompanied in the end by members of the local K-Swiss affiliate: the Boys & Girls Club of America. On display were different K-Swiss models made for casual wear, tennis play, fitness training, and even skateboarding. In the end, the event was a successful kick-off to this year’s US Open tournament and cemented K-Swiss’ position as an all-inclusive California Sport brand. Check out more pix of this collection being modeled after the jump.