Diversify or die: San Francisco’s downtown is a wake-up call for other cities

Jack Mogannam, manager of Sam’s Cable Car Lounge in downtown San Francisco, relishes the days when his bar stayed open past midnight every night, welcoming crowds that jostled on the streets, bar hopped, window browsed or just took in the night air.

He’s had to drastically curtail those hours because of diminished foot traffic, and business is down 30%. A sign outside the lounge pleads: “We need your support!”

“I’d stand outside my bar at 10 p.m. and look, it would be like a party on the street,” Mogannam said....