American Society of Composers, Authors and Publishers (ASCAP) is a performing rights society that represents its members by licensing and distributing royalties for their copyrighted works. They offer lots of resources online, including Articles and Advice, and a resource guide. They also offer members health and dental insurance (through Music Pro Insurance). Membership is free to individuals who meet certain eligibility requirements.
7920 W Sunset Blvd
Los Angeles, CA 90046