Billed as "the only Halloween party in the Valley," (we guess they mean the only one that matters?), this Federal Bar bash promises a performance on its main stage every half hour. Prizes will be given out throughout the night for best/sexiest/funniest/etc. costume (and as the party hosts get more drunk, the prizes will flow more freely). Even if you're not gunning for free stuff, come dressed up according to this year's theme: Heroes vs. Villians.