To celebrate the approval of Referendum 74 in Washington, Cupcake Royale on Capitol Hill is inviting everyone to enjoy a slice of what it’s dubbing the “world’s largest gorgeous rainbow cake.” The cake cutting goes down at 3 p.m. and goes on until the cake is gone. If you miss out and still want to partake in the fun, Gaybies — baby rainbow cupcakes — and ObamaCakes are on sale at all Cupcake Royale shops until this Sunday.