open mic
US /ˈoʊ.pən ˌmaɪk/
UK /ˈoʊ.pən ˌmaɪk/

1.
open mic, serata a microfono aperto
an event at which anyone can perform, especially by telling jokes or singing
:
•
She signed up for the open mic night at the local cafe.
Si è iscritta alla serata open mic al caffè locale.
•
Many famous comedians started out at open mic events.
Molti comici famosi hanno iniziato agli eventi open mic.