Are cafeteria's located in a State Building employing less than 5 full-time non-management employee's required to post any type of notice on walls where employee's can see? If so what is required?
If the cafeteria is located in a State Building are there further requirements regarding posting of job, safety or insurance information for view by the employee's?

I do not know if this is what you are looking for, but it is interesting reading at best.

http://www.pasassociates.com/posters.html

http://www.dir.ca.gov/FAQworkplacepostings3.htm

There also may be posters required under federal law as well.
http://www.dol.gov/osbp/sbrefa/poster/matrix.htm

There are companies that provide all the required posting notices in a single document (but they may be pretty big) for a price.