In all seriousness, though, this should be a great show...except that there are like 6 other great shows going on that night (not to mention all of those Halloween parties your friends are throwing), so it's going to be a tough call on what to check out. Chances are you already know about Diplo, so here's the scoop on DJ Marlboro via the Sonotheque website:
Fernando LuÃs Mattos da Matta, aka DJ Marlboro, is currently one of Brazil's most exciting DJs, whose setsspecializee in Baile funk, the cutting edge Hip-Hop hybrid that comes straight from Rio de Janeiro's favelas. This "Ambassador of Funk" as he is known, was nicknamed Marlboro because he comes from MÃ©ier, a suburb of Rio de Janeiro, far from anywhere, "further than the land of Marlboro."
Hmmm...it is hard to resist a Booty Bash, might be a good option if your friend's costume party turns out to be lame. Whatever you decide for Friday, all I've got to say is pace yourself... Halloween isn't even officially until Monday!