In a neon green hoodie, jeans and white tennis shoes, comedian Michael Che, a stand-up comic best known for his “Weekend Update” co-hosting gig on “Saturday Night Live,” took the stage at the Vic just before 11 p.m. for the second of two shows on Saturday night. Holding a red Solo cup in one hand and the mic in the other, he sat on one of two wooden stools placed at center stage and started into a relaxed back-and-forth with his host and opening act DJ Cipha Sounds.