Michael Shindler has a tintype portrait studio called Photobooth, on Valencia Street in San Francisco. Over the past year, he has had about 3500 people come through the door, sit in front of the camera and have their portrait made. Some of them came specifically having searched out Michael, and some just wandered in and asked what he was were doing there.
Either way, he does not choose who he photographs, and likes the exercise of being constantly confronted with new people and having to figure out what he finds captivating about them.
Michael prepares each tintype plate by hand and make a single exposure of each person (occasionally two, if a mistake is made).
The tintype is processed immediately so the subject can walk out the door with it about 15 minutes later.
Since each plate is a unique direct-positive, there is no negative and only one copy of the image exists. So, Michael scans them before giving them away. But this is something he very much like about tintypes: they are things, actual objects! And things are good.
There’s also a short video at the bottom of this page (made by the good folks at Cool Hunting), that shows the shop/studio and explains how the process works.