actually, I've spent alot of time working in the underground scene (mainly around LA and San Bern) and gone to alot of mainstream parties and out of the two, I prefer the mainstrem. Theres nothing fucked up about mainstream parties, they're safer, ALWAYS have better talent and have 100% chance of NOT being busted up because, what do you know, your partying in a LEGAL venue. When dealing with underground parties, you've got the pain in the ass map-point, crappy security who are only looking for mass amounts of drugs to appease the house dealers so god knows how many weapons get in, and while the underground is a great place for new and up-coming DJs & MCs to play and promote, they really are only creating background music for a drugged out frenzy (unless they are smart enough to hand out demo-tapes)
Don't get me wrong, I LOVE THE SCENE but I've been to enough Masonic Temples and drivin through numberous whare-house mazes that I'd rather leave it to the professionals.