Concert details:
Friday, August 21st, 11 pm
4 Pesos de propina, Arbolito, Karavana
Salón Sur - Av Sáenz 459
Pompeya, Buenos Aires
Tickets can be bought ahead of time at La Tribu (Lambaré 873) and at all the "Locuras" for 20 pesos. Or you can pick up tickets at the door for 30 pesos.
I also heard recently that there is a band called "Arbol". I'm going to have to do more research!