The library at a college/university
Test tomorrow, gonna go rage at Club Lib in preperation
"the library"; A pseudonym for the library; usually used so that someone doesn't feel "nerdy" for being at the library when everyone else is out; Not necessarily expected to be a cover, but is more used for comedy for someone to poke fun at themselves.
Person A: What were you up to Saturday Night?
Person B: Club Libs, haha.