Here is a job posting found on Craigs List, Chicago:

Mayor Daley’s Bicycling Ambassadors are the City of Chicago’s bicycle
outreach and education specialists. Ambassadors attend events across
the City of Chicago, encouraging people to use their bicycles safely
and more often. The Bicycle Ambassador season is from mid-May to
mid-September. This position is full-time and seasonal. Applications
are due by Friday, March 30, 2007. For more information and a
complete job description, please visit www.bicyclingambassadors.org/.