I used to see photo booths at countless amusement parks, shopping malls, and cheapie department stores. Photo booths had a practical purpose, allowing you to easily and quickly get an ID picture for a train pass or similar, but we all know what's really involved... you want to cram in as many people as possible to take silly pictures.
For those who might not have experienced this, you slink into the booth, draw a curtain, then use the reflection in the camera's glass to check out your mug. Four poses and four flashes later (okay - I'm being poetic... the process takes five minutes), the machine spits out a strip of film with your pics.
I know that today there are photo sticker booths that are completely digital. You can pick from a bunch of novelty borders, draw on mustaches, etc. Okay - crummy camera plus inkjet printer, everyone gets that. Considering that the photo both is from well before the digital age, the technology is kind of amazing. It is actually a chemical process that really runs your film through tanks of juice the old fashioned way. Outdoor photobooths like the one pictured require adjustment throughout the day as the outside temperature changes.
I'll give it to the digital photo booths of today for being somewhat more fun, but I'm glad that someone in the 1920's saw fit to brute force the technology of the day into an outdoor kiosk so that we can enjoy more than 75 years of funny photographs.