jam session

US /ˈdʒæm ˌseʃ.ən/
UK /ˈdʒæm ˌseʃ.ən/
"jam session" picture
1.

jam session, sessão de improviso

an informal gathering of musicians to play improvised music together

:
The jazz club hosts a weekly jam session.
O clube de jazz organiza uma jam session semanal.
They ended up having an impromptu jam session in the living room.
Eles acabaram fazendo uma jam session improvisada na sala de estar.