You should contact the law school in San Francisco. There are many students who may want to assist you, but ask yourself if it is a good idea. They do not know the intricacies of the law the same as someone who has practiced for a long period of time in that field. I do not recommend this approaach at all.
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The 4 big law schools in southern CA, USC, UCLA, Southwestern, and Loyola, all have entertainment law programs, since this is where the industry largely is. Contact the recruiting offices, you can probably get a student for the summer, or an intern for free who could telecommute and would be thrilled to get their feet wet at your business.
Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.
Only get an attorney licensed in your state, or the state of the issue, to aid you. I am an entertainment attorney, but not licensed in California. Definitely do not get a law student, or anyone for that matter, who is not licensed in California, to give you legal advice.
If you are looking for pro bono legal advice regarding entertainment law, there are probably a lot of organizations that can aid you. For example, where I practice law in South Florida, there is a great organization offering free or low cost legal services called "Artserve".
Also, where I practice in South Louisiana, Tulane law school offers pro bono legal advice to musicians through their ELLA program, which has an attorney supervisor.
In San Francisco, check out Golden Gate law school. They have a great intellectual property program for law students, and may have a community pro bono program with attorney supervisors and law student helpers.