Seasonal bike hash — one Sunday per month, roughly noon, April through October; dormant in winter.
Seattle's bike hash — a 'drinking club with a cycling problem'. Monthly Sunday bike-bashes around the Puget Sound area through the April-October season.
SH2B#59 (Tour de Franzia Season Opener)
SH2B #56 (Save an Ironhorse, ride a cowboy)
SH2B #54 (Your dad needs some exercise)
SH2B #53 (The Cascadia Subduction Ride)