‘At one of them on Saturday, there was a DJ spinning hip-hop under a bright late afternoon sun and 150 or so people dancing and drinking, overlooking Broadway, the Music City’s Mecca. Nearly all the patrons at the club were in their 20s. Dudes with backward ball caps, young ladies with iPhones wedged into the back pocket of high-waisted jeans. And at the front of the DJ stage, under the watchful eye of two bouncers, were six grandmothers from Buffalo.’