recreation room
room used for a variety of purposes, such as parties, games and other everyday or casual use
en-GB/ˌɹɛkɹɪˈeɪʃn ˈɹuːm/
en-US/ˌɹɛkɹiˈeɪʃən ˈɹum/
room used for a variety of purposes, such as parties, games and other everyday or casual use