Last Night's Parties: Alec Baldwin Brings The Girlfriend Out For Tennis, Charlotte Ronson Celebrates Makeup Line

New Yorkers readied themselves to pretend to care about tennis with the kick off of the US Open; LPGA Champion Cristie Kerr held a benefit at PhD at the Dream Downtown; Charlotte Ronson celebrated her new make-up line with friends and family; and Danielle Staub made an appearance for reality TV. Last night's parties sharpened their claws!

US OPEN Opening Night Ceremony

Where: USTA Billie Jean King National Tennis Ctr

Who Was There: Hilaria Thomas, Alec Baldwin, David Dinkins, Joyce Dinkins, Donald Trump, Jim Courier, Robin Roberts, Greyson Chance

Other Details: It's on! Opening Night of the 2010 US Open took place at the Billie Jean King Center, celebrating four individuals who have overcome obstacles and adversity to achieve great things. Taio Cruz was scheduled to perform but was unable to make it because of Hurricane Irene. Guests still got a chance to see YouTube sensation Greyson Chance sing the National Anthem, and gawk at Alec Baldwin and his new, younger girlfriend Hilaria Thomas. [Via]

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Cristie Kerr Inaugural Liberty Cup Charity Golf Tournament Kick-Off Celebration [Take a look at more photos HERE!]

Where: PhD, Dream Downtown Hotel Rooftop

Who Was There: Jaime Hector, Cristie Kerr, Bryan Lebedevitch, Lou Nanne, Dorothy Delasin, Vicky Hurst

Other Details: LPGA Champion, Cristie Kerr hosted the kick-off celebration at Dream Downtown for the two day Inaugural Liberty Cup Charity Golf Tournament benefiting Birdies for Breast CancerFoundation.  Be sure to take a look at more pics HERE.

Charlotte Ronson Beauty and Sephora Dinner

Where: Hotel Chantelle

Who Was There: Charlotte Ronson, Dani Stahl, Ann Dexter-Jones, Alex Jones, Drea De Matteo, Genevieve Jones, Becka Diamond, Sky Ferreira, Harley Viera-Newton, Cassie Coane

Other Details: To introduce Charlotte Ronson Beauty, the new makeup line coming to Sephora this Fall, the designer hosted a special dinner for friends and family at Hotel Chantelle. Harley Viera-Newton, and Cassie Coaneplayed DJ as guests mingled. Charlotte held a similar dinner for the line last week in LA. [Via]

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Malaria No More Summer Soiree [Take a look at more photos HERE!]

Where: Soho House New York

Other Details: Miss Tanzania Flaviana Matata and Judith Ripka hosted an evening of cocktails and hors d'oeuvres to kick off the beginning of summer's end and benefit malaria research.  Be sure to take a look at more pics HERE.

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VH1 "Basketball Wives" Premiere Party

Where: Tian at the Riverbank

Who Was There: Danielle Staub, Alisa Maria, Tracy DiMarco, Dawn Haynes, Jeffrey Gurian, Raye 6, Tanya Young Williams

Other Details: Cast members and former RHNJ cast member and crazy person, Danielle Staub, came out to celebrate the show's season premiere. There was surprisingly no drama! [Via]