I usually tip something in Thailand, whether it's for restaurant food or my Bolt taxi ride. I don't tip anything at the grocery store or at the convenience store. And yes, the tips often go into a pool to be divided among all the staff. I guess it's just a matter of habit for me, as I'm from the US. The whole touch screen thing has gotten out of control in the US. For example, you walk up to the counter in a fast food place to order some take out food. A sandwich, let's say. A place where you'd never usually tip, as they aren't doing anything other tan taking your order. They flip a screen around for you to pay, which includes several choices for tips, starting at 20%. And you're almost afraid not to tip, lest they sabotage your food. Although one place I used to go, Firehouse Subs, used to allow you to "round up" the payment to the nearest dollar, for a contribution to charity. I thought that was OK. A few extra cents for a good cause.