There are so many clubs downtown that it's impossible to list everything. If you're in costume you're going to be welcome pretty much anywhere. Bliss Ultra Lounge is having its Haunted Mansion Party featuring House music from DJ Mickey Bono. Church Street Bars has their Halloween Party and your $10 admission gets you not only into Antigua but also into the triple-stacked Chillers, Beer Belly Brewery and Lattitudes. Wall Street Plaza is having their Plazaween IX. Admission here is also $10 and you get all the clubs along Wall Street. I rarely mention Wall Street clubs because I've rarely found techno and only 2 of their clubs feature DJ's. But they are advertising DJ Digital at Slingapours, DJ Larry at One Eyed Jacks and DJ Flint on the main stage for Saturday night. Finally, Tabu advertises itself as having downtown's largest costume contest with their Vampire Ball. DJ's Richie Rich and Jay Mac will be spinning Club Remixes, Urban Beats and Classic Hip Hop.
Away from downtown Blue Martini inside the Mall at Millenia will be having costume contests Thursday, Friday AND Saturday nights beginning at 7:30pm. Shakers Lounge on SR436 in Casselberry is having a Halloween Bash & Costume Party both Friday and Saturday nights. This venue is located where Calico Jacks used to be. No cover. There is also Bar Louie over on Sand Lake Road which is featuring the band Switch beginning at 9pm on Saturday night for their 80's Fright Night.
There is really nothing formal planned at CityWalk nightclubs. I recall last year that about 25% of patrons had costumes on and it was crazy nonetheless, especially for a Friday. That was also the night I discovered DJ Leony playing House sets in Latin Quarter and I learned that somehow I could survive without Mannequins. With Halloween on a Saturday night this year, it should be really crazy in all the clubs! Besides DJ Leony at LQ, look for DJ AJ in The Groove and DJ Doc at Red Coconut Club.
Pleasure Island clubs will be dark for Halloween this year. Mannequins, 8TRAX, Motion and Soundstage will all be closed. They are being refurbished for your future enjoyment. Not. Trick or Treat! (However, if you've got no life, feel free to stop by for Celebrate Tonight with shows at 5:30 pm, 6:30 pm, 7:30 pm, 8:30 pm, 9:30 pm, 10:30 pm, 11:30 pm.)
Rix Lounge in Disney's Coronado Springs Resort will be having their Black & Orange Ball on Friday night though. Wear black and orange or wear a costume. Admission is $15 at the door and $10 in advance. Not aware of anything special going on at Atlantic Dance but I'm sure some will be dressed up.
Those are the main ones I'm aware of. Readers, feel free to add in the Comments section.