The tribe has spokes. RIDE National Bike to Work Day What: A healthy and ecofriendly commute alternative sponsored by the Washington Area Bicyclist Association. Why: Novice riders can join a commuter convoy through the city. When: Fri. Where: Wherever roads may lead. Starting points and pit stops online at waba.org. STYLE The Front Row What: Bethesda Row hosts a weekend of trunk shows, sales, and beauty consultations. Why: It’s all about being front and center. When: Thurs.-Sat. Where: Locations at bethesdarow.com. CHEER Preakness Party What: Track the Triple Crown in true fashion with black-eyed Susans and Maryland crab cakes. Why: It will get your heart racing. When: Sat., 4-7 p.m. Where: Round Robin Bar, 1401 Pennsylvania Ave. NW, b/t 14th & 15th Sts. (202-637-7348). SEE Arcadia What: Unleash your inner dweeb with Stoppard’s hilarious story of math and mystery. Why: It’s a big plus. When: Thru June 14. Tues.-Thurs., 7:30 p.m.; Fri., 8 p.m.; Sat., 2 & 8 p.m.; Sun., 2 & 7 p.m. Where: Folger Theatre, 201 E. Capitol St. SE, b/t 2nd & 3rd Sts. (202-544-7077). WATCH II Reel Time Brazil What: Get Rio with five free film screenings. Why: Mingle with the Embassy of Brazil, for reel. When: Fri., 7-8:30 p.m.; Sat., 4-5:30 & 6-7:15 p.m.; Sun., 4-5:30 & 6-7:30 p.m. Where: Fri., Hirshhorn Museum, Independence Ave. & 7th St. SW; Sat. & Sun., Greenberg Theatre, 4200 Wisconsin Ave. NW, at Van Ness St. (202-238-2708).