Many people and businesses have been displaced in San Francisco. There are two sources of information we know of that track this displacement. Let us know if you know of others.
The Anti Eviction Mapping Project covers a lot of data and information. http://www.antievictionmap.com/
Extinct Art Spaces is an interactive site where you may add your list of at risk and lost spaces : https://www.google.com/maps/d/viewer?mid=zi8o8SCkb7HY.kDK_2MVtKNWo
Some of the known multi-studio sites are listed here: