While doors open tomorrow on the DC area’s latest sweaty cardio craze, SoulCycle Bethesda (4931 Elm Street) will actually be celebrating its Grand Opening on Saturday, (12/20), with a DJ, photobooth, and healthy refreshments by Sweetgreen. No tix, so the ribbon-cutting rendezvous can’t get soul-ed out… but plan to get your butt on a bike before week’s end, and then treat yourself to the pedal party!