It’s Memorial Day weekend, the unofficial beginning of summer, so get outdoors and enjoy one Brooklyn’s coolest summer spot. The party is happening all weekend long with a live DJ, BBQ and even a dunk tank. The kiddies (and you) can have fun and cool off in the splash pad and go for spin on the roller rink with complimentary skate lessons. Make a day of it and grab lunch or dinner, maybe even a drink, at the Blue Stone Cafe.