This metaphor refers to young people.
"Poetry and wine take advantage of one's youth" is a poem from Bai Juyi, a poet of the Tang Dynasty. The original line is "Poetry and wine take advantage of one's youth, wandering from one's own destiny", which means that both poetry and fine wine are enjoyed when one is young. Yes, wandering and running around is destiny, just like everyone else. This sentence expresses that life is short and you should fully experience and enjoy the beautiful things in life while you are young.