MILWAUKEE (CBS 58) -- You never know who you're going to run into on a summer night in Milwaukee.

Hundreds of people attended the underwear bike ride. The ride happens once a month in the summer.

The group takes off most of their clothes and tours the city sharing a positive message along the route.

"Since day one, it's been a celebration of bikes and to promote positive self-body image, a Milwaukee phenomenon if you ask me," said one participant.

The after party is at Company Brewing and we're not sure what kind of dress code the bike riders have to follow there.