What are some organizations that provide their services free of charge for fundraising at high schools? ?

I am looking for ideas and ways to fundraise and one that occurred,however non-original it may be, was to bring professionals say in make-up to teach our students free of charge, or a restaurant that donates their food so we can sell it in exchange for publicity.. Etc. I know these organizations may not be as typical or obvious as I wished, which is why I need ideas and references.