gild, guild, lodge, club, society, order - a formal association of people with similar interests; "he joined a golf club"; "they formed a small lunch society"; "men from the fraternal order will staff the soup kitchen today"

International Association of Lions clubs, Lions Club - club dedicated to promoting responsible citizenship and good government and community and national and international welfare

Rotary Club, Rotary International - a group of businessmen in a town organized as a service club and to promote world peace

center, centre - a building dedicated to a particular activity; "they were raising money to build a new center for research"