賓主盡歡

both the guests and the hosts thoroughly enjoy themselves (idiom)

visitor / guest / object (in grammar)

guest and host

owner / master / host / individual or party concerned / God / Lord / main / to indicate or signify / trump card (in card games)

to use up / to exhaust / to end / to finish / to the utmost / exhausted / finished / to the limit (of sth) / all / entirely

to thoroughly enjoy oneself

joyous / happy / pleased