Recommendations needed: what to do with my 13 year old son in the quarter while Wife and daughter are at Taylor Swift?

Probably dropping them off at the dome 4:30 ish. Picking them up after around 11:30.

First time in NOLA with the kids outside of youth sports.

He’s into music, but are there any all age shows in the quarter on a Saturday?

We really have time to go anywhere in the surrounding area, but what’s good for a 13 year old dude down there (or nearby)?
If you’re cool with walking, I’d recommend hopping the Ferry and bopping around Algiers Point
Barracuda is an outdoor seating taco restaurant
There’s also pizza and burgers in that area
It will get you out of the crush of humanity and the Ferry gives a great view of the city

If he actually wants the crowds, then a stroll on Bourbon will probably make an impression on him, then you can head over to Frenchman- there should be plenty of music there even if you can’t get in to the clubs