U.S. Bureau of Labor Statistics, QCEW, San Francisco County, private food services and drinking places (NAICS 722), Q1 2019 vs Q1 2026: 2019, 2026. Jobs 66,697 to 53,110; average weekly wage $625 to $847 (not inflation adjusted).
DoorDash 2026 Restaurant Industry Trends Report (Dynata survey of 3,001 US consumers and 509 operators, March 2026), via QSR Magazine. The 40% unanswered reservation calls figure is described there as an industry-wide estimate.
Diageo Bar Academy benchmark (1% to 2% healthy variance; 5% to 25% without controls), as cited by Bar Society. Secondary source.