Seriously -- everyone. They can't all be at work, can they?
https://www.nytimes.com/video/multimedia/100000002151331/new-york-city-1929.html?action=click>ype=vhs&version=vhs-heading&module=vhs®ion=title-area
As an bit of an addendum question, how much did one of those suits cost relative to a person's wage back then? Would everyone (with a job) have owned one (or more suits)?
Similar questions ...
Did Men REALLY dress as well as portrayed in European and US cinema, '40-'60s? If so ...
How were men in pre-war America and Europe able to afford to wear suits exclusively?
How come even poor people in photos from the late 1800s/early 1900s are 'well dressed' by the standards of our times?
FAQ - Daily Life in the Past - Fashion - Suits & Ties