Last Night's Parties: Kate and Rooney Mara Step Out For The "Side Effects" NYC Premiere, The Glamourai Hits The Phillips House Fine Jewelry Celebration At Saks Fifth Avenue, And More!

Saks Fifth Avenue hosts a private cocktail to celebrate SaksFirst

Where: Saks Fifth Avenue Who was there: Guests included Solange Knowles, Suzy Johnson, Steve Sadove, Alexandra Feldman, Alyssa Nagler, April Cho, Christine Doyle, Darren Oscer, Eleanor Banco, Jennifer Yee, Karen Rassieur, Karyn Benvenuto, Kelly Framel, Mark Fleming, Mary SMith, Nicole Bandklayder, and Tom Murro. Other details: To celebrate all of the new changes to Saks' SaksFirst loyalty program, the department store held a cocktail party at its flagship last night, with none other than Solange Knowles DJ'ing the event. [Photos via BFA]