All that jazz

Jazz, popular from Prohibition to the big band era, may get ranked with classical music, but in Northern Colorado, it’s getting lots of traction.

Dozens of local venues from bars and restaurants to clubs and speakeasies focus solely on jazz or are including jazz as part of their entertainment lineup.

License No. 1, an underground, speakeasy-style cocktail lounge in the Hotel Boulderado in Boulder, rotates through bands every month, bringing in jazz, rock-n-roll, folk and other styles of music on Friday and Saturday nights, plus regular shows of blues on Wednesday and folk rock on Thursday.

“Forty percent of the bands we have…