“Coming from Colorado, it was interesting for me to learn how many lines are drawn from both the punk and jazz scenes in New Orleans,” Carly Meyers says while sitting in Stumptown Coffee with her ROAR! bandmate, drummer Adam Gertner, as both drink from glasses of iced-coffee spiked with whiskey.

“Playing with a brass band really taught me how to loosen up,” continues Meyers, who s...