Join us for Back Alley Bikes Volunteer Night! on December 04, 2025, from 5:00 PM to 8:00 PM at Back Alley Bikes, 3611 Cass Ave (Alley/Rear Entrance), Detroit, MI 48201, United States. This weekly Thursday Volunteer Night invites community members to drop in—no sign-up needed—as we prepare for the colder months by sorting the workshop and warehouse, moving bikes, stripping bikes, and readying donated bikes for those in need.