Halloween may land on a Monday this year, but the boo-zy celebrations have already begun. Plus, it's only fair you get to parade your costume around as much as possible before it's no longer appropriate to moonlight as a sexy Indiana Jones, a sexy bumblebee, a sexy panda, or whatever other skin-baring-themed attire you can think of. Here are seven frightfully fun Halloween parties worth checking out — open bars, costume contests, and high-energy DJ sets guarantee you an All Hallows' Eve to remember.

  • Santos Party House (98 Lafayette St., 212-584-5492, pictured above) will host a Fright Night bash on Saturday, Oct. 29. Doors open at 10 p.m., Corona Light open bar will be honored from 10 p.m. to 11 p.m., and DJ Sinatra and DJ Holosound will man the turntables all night long. $15 admission.

  • Home to the official Halloween parade afterparty, Webster Hall delivers a double dose of frightfully good fun. What's in store? Renamed "Webster Hell" for the evening, you can expect hungry vampires to roam the grand ballroom, wicked demons to dance among the masses, pyrotechnics abound, virgin sacrifices to take place on stage, a bountiful costume contest (winner goes home with $5,000 in cash!) to ensue, and something called a basement bloodbath to happen around 2 a.m. If you're curious about how it all goes down, head to Webster at 8 p.m. $35 admission.

  • DJ duo The Chainsmokers will hold court at the Dream Downtown (355 W. 16th St., 212-229-2559) on Saturday, Oct. 29. The party starts at 9 p.m. and will rage on until the wee hours of Sunday morning. Prep yourself for an all-night danceathon. $40 admission.

  • Capitale (130 Bowery, 212-334-5500) will host its tenth annual masquerade Halloween party on Monday, Oct. 31. If you're not too partied out by the day of, Capitale always shows its revelers a good time. Doors open at 9 p.m. and, if you're prompt, you'll get in on an hour-long open vodka bar. $15 admission.

  • Gansevoort Park Avenue's (420 Park Ave. South, 212-317-2900) sinfully stylish tribute to terror will be held on Saturday, Oct. 29, starting at 9 p.m. The hotel encourages Halloween debauchery of the highest style and glamour caliber. $30 admission.

  • STK (26 Little W. 12th St., 646-624-2444) will throw a sexy massacre bash on Saturday, Oct. 29. The restaurant has even gone so far as to rename its neighborhood the "Meat-hacking District" for the evening. We're sure whatever the night brings, it's going to be a silly good time. $25 admission includes coat check fee.

  • On Saturday, Oct. 29, Hudson Terrace (621 W. 46th St., 212-315-9400) hosts its 1940s canteen party. Come dressed as a pinup girl to compete in the costume contest with over $1,000 in prizes. Parisian DJs Pitch Boyz will be spinning on the rooftop, and DJ Marvin will be rocking out in the salon. Doors open at 9 p.m., and admission is $25.

Source: Santos Party House