Jack Colton’s 20 Most Beautiful People in Las Vegas Party at Liquid The nightlife guru celebrates his list of pretty power people at Aria’s pool lounge. Peepshow stars Holly Madison and Josh Strickland are just two of the sexy people that made this year’s list. Find the rest of the good-looking locals at jackcolton.com/2011mb.htm. May 12, doors at 11 a.m., $20 men, $10 women, locals free.

Friday the 13th at Marquee Halloween might be six months away, but Marquee gives you a great reason to get a second wear out of last year’s costume. With DJ Chuckie in the house for Friday the 13th, it’s bound to get scary. Dress to impress—costumed guests are free before 11 p.m., and competitions for most horrifying, sexiest and best overall costume complete the festive fête. May 13, doors at 10 p.m., $30 men, $20 women.

Plunder: A Pirate Party at Piranha Piranha wants you to “get your share of loot and booty” at their Friday pirate extravaganza. The loot comes in the form of a free open bar for pirates (11 p.m. to midnight) and cash prizes for winners in the sword fight and sexiest pirate costume contests. The booty? You can figure that one out. May 13, doors at 10 p.m., $20, locals free.

T-Pain at Ditch Fridays The Palms wants you to ditch the office and party poolside with Grammy winner T-Pain behind the mic. With a weekend ahead of you (and the Miller Lite Liteguards roaming with giveaways), the “Goose” will have you “feeling loose” in no time! May 13, noon, $25 and up, local ladies free.

UNLV Grad Bash at McFadden’s College graduation is a bittersweet time, especially in this economy. Following the three-hour commencement bore-fest, UNLV graduates can drink free at the Rio saloon from 10 p.m. to 1 a.m. It’s a great way to celebrate landing your dream job—or to drown your sorrows while you await that next interview. And if you haven’t donned a cap and gown recently, just wear rebel gear to score a free shot! May 14, 10 p.m., free.

Angel Porrino & Samantha Ronson at Gallery Holly Madison’s BFF finally makes her solo-hosting debut Saturday at the Strip’s newest nightclub. Will the Holly’s World crew “Report to the Floor” to show its girl some support? One celebrity definitely on the list: DJ for the evening (and Li-Lo ex) Samantha Ronson. May 14, doors at 10 p.m., $30 men, $20 women.

Daystar Sundays at Encore Beach Club Celebrity Apprentice star Lil Jon takes a break from the board room to work the tables under the sun at the Encore dayclub. Fellow Wynn/Encore resident DJ Steve Aoki will join the Donald’s potential protégé for an afternoon of sensational sounds. May 15, doors at 11 a.m., $50 men, $40 women.

Sneaker Heads at Blush Blush ditches its dress code for a night at this special edition of the boutique club’s industry night. Rock your best kicks and join fellow footwear fanatics (and a few Platinum models, celebrating their birthdays together) to catch a performance from hip-hop breakdancers Super Cr3w. May 17, doors at 9 p.m., $30, local ladies & industry free.