weds (various times): summerstage: the city parks foundation presents its 40th season of free and benefit performances across the city. today: spoon / ratboys / bodega / alisa ali at central park’s rumsey playfield (6-10pm); duck down music presents: heltah skeltah + o.g.c. of boot camp clik, nocturnal + da storm 30 year anniversary at herbert von king park in bed-stuy (6-9pm). free admission.