Here's how much you should tip at restaurants, salons, hotels — for food delivery, and more

• A growing number of businesses are requesting tips from customers.
• Yet, the rules of tipping depend on all kinds of different factors, etiquette experts say.
• Here's how much you should tip for restaurants, delivery, salons, Uber rides, and more.

It's not a big question about whether you should tip a server in a sit-down restaurant: That's pretty well-established.

But what about all the other places where tip jars — virtual or otherwise — are popping up, especially since the pandemic upended tipping norms?