When you’re a personality as big as Funk Flex, you celebrate your birthday all weekend. This party, on the second day of the New York hip-hop institution’s birthday weekend, features another collection of legacy acts from Funk Flex’s considerable sphere of influence. The headliner is Crystal Waters, the house and dance music singer known for hits like “100% Pure Love” and house staple “Gypsy Woman (She’s Homeless).” She’s joined by Cynthia, the Puerto Rican freestyle singer who had a hit with her Johnny O collaboration “Dreamboy/Dreamgirl” and her cover of the Stylistics’ “Break Up to Make Up”; Frankie Cutlass, a member of Funk Flex’s DJ collective The Flip Squad whose hook from his classic single “Puerto Rico” became a staple of Funk Flex’s sets; Force MDs, Staten Island’s own R&B group that fused doo wop and hip-hop and peaked with their Top 10 pop hit “Tender Love” in 1985; Sunshine Anderson, the North Carolina R&B and soul singer who had a hit in 2001 with her debut single “Heard It All Before”; Mr Cheeks, formerly of the Lost Boyz, the Queens trio responsible for “Lifestyles of the Rich & Shameless” and “Renee,” who went solo in 1999 and had a hit with his Missy Elliott and Petey Pablo collaboration “Lights, Camera, Action!”; and CL Smooth, one half of the duo with Pete Rock responsible for foundational works such as “They Reminisce Over You (T.O.N.Y.).”