Airsoft field in bay area?

i love airsoft and know alot about everything but the fields. i looked for hours and cant seem to find one near me that i can go to. i dont mind ~$20 entry fees, but i hate the bb requirements. i need a field that doesn't requite biodegradable bbs. combat enterprises is out of the question and so is anything that makes you buy bbs from them like they do. any help? please?