Most people wearing Groucho Marx glasses
Who
City of Chicago's Outdoor Film Festival
What
4436 people
Where
United States Chicago, IL
When
The most people wearing Groucho Marx glasses was achieved by 4,436 participants in an event organised by the City of Chicago's Outdoor Film Festival in partnership with the Goodman Theatre in Chicago, Illinois, USA, on 21 July 2009. The event started at 5:00 pm and finished at 8:33 pm