Oakland’s biking movement has been steadily gaining ground for a while now — with new proposed bike lanes, raucous bike parties, and themed-rides — and to celebrate all that, a new art exhibit at City Hall (1 Frank H. Ogawa Plaza) depicts Oakland’s bike culture. Bike Life consists of work by three Oakland-based female cyclists and bike advocates, Pamela Palma, Mary Ann Blackwell, and Jillian Betterly. The three artists each capture different parts of Oakland’s biking scene in their artwork, which includes black and white portraits of cyclists, brightly colored paintings of riders throughout the city, and color shots of people on group bike rides and bike camping around the Bay Area. The artists’ hope is that the exhibit captures the breadth and diversity of the cycling scene and motivates more people to ride. The exhibit’s opening reception is this Friday, when the artists will be present to discuss their work and answer questions.