a group of people with a common purpose such as research or hobbies / a member organization for socializing, playing and sports; or meeting place for them / extracurricular activities at a school

(in compounds) a crab

school (institution dedicated to teaching and learning)

money laundering

fan club

sports club

golf club

club sandwich

glee club

a sports team which not run by the company, but by the organization of like-minded people in the local community