Yes, You Should Still Tip 20% on Top of a Restaurant Service Charge | Bon Appétit

"A neighborhood restaurant that opened in Newburyport with a clear, table-side placard announcing no tipping and a menu price that bundles labor, cost of goods, operating costs, and an implied 20% tip into items such as a $16 pepper Jack smash burger. Owners designed the approachable burger-focused menu to reduce sticker shock while supporting an equalized pay structure for eight staff members—yielding hourly rates of roughly $18 to $25—so the business does not depend on whether customers leave additional tips." - ByMaggie Hennessy