It's like the swimming-pool version of dogs playing poker, and quite the sight to behold: Dogs of every size and breed jumping in and hauling themselves out of the Scheitler rec center's outdoor pool, chasing balls and Frisbees, swimming laps and, yes, even sunbathing along the edge. On the last day of the season every year, Scheitler opens the pool for a pooches-only Pawpalooza (though a few brave people jump in, too). The cost is $5 per dog, and proceeds go to local animal shelters and kids' programs. Bonus: The rec center is located next door to the Berkeley Lake Dog Park, which has plenty of room for the pups to shake off the excess.