You have a song and you have never played it for anyone who was not legally obligated to be kind about it. There is a room in San Diego that exists specifically for that problem.
Because it is a coffee house and not a bar, the room listens instead of talking over you. That single fact changes everything: quiet instruments work, dynamics are audible, and the distance between you and the nearest table is essentially nothing. Gaby Aparicio hosts, keeps the order honest, and does not let the list get gamed by whoever showed up loudest.
Half the crowd is performers waiting their turn. The other half came because the format produces surprises — some Tuesday, somebody nobody knows gets up and does something remarkable.
Sign-ups happen before the music starts and the list fills. Check facebook.com/javajoesopenmic for the current address.
Bring the friend who has been writing songs in their car. Do not tell them why.