I just stumbled across a new event for San Jose del Cabo:
Sal y Musica Festival. Musical tour through downtown San Jose
"One of the newest tours is Sal y Musica Festival, a lively tour through the streets of the San Jose del Cabo, Historic Area (downtown), that takes place on Tuesdays and Fridays evenings, from 6pm all the way to midnight. It is a place to enjoy live music at some restaurants or even better on the streets. Savor a shot of tequila or a wonderful margarita listening the tunes of a rock band, a guitarist, mariachi or folkloric group, whether is your taste you can have it all at this renovated district."
I think this could be the event that some of the merchants described to PacNWFamily as an extension of the Thursday night art walk. It just started about a month ago, so I haven't heard any reviews just yet.
Guess I'll have to check it out next week.