When Dorothy Nordness heard about the Ann Arbor Bicycle Choir, she was intrigued. It was "just odd enough to sound really fun," she said. "When you tell somebody you're in a bicycle choir they raise their eyebrows and say, 'What? What do you do?'" said the Ann Arbor woman, who is an alto in the choir. The choir, which has about 10 regularly participating members, was formed in 2009 and has performed at a variety of community events, sometimes with bikes, and sometimes without. The group can also be spotted singing while pedaling through town, whether on individual bicycles or on a circular conference bike that seats several.