Sorry for creating another tipping board but I have a question. So I was at a yogurt place (a Pinkberry knock-off) and I noticed there was a tip jar and couldn't help but think if I should tip him or not. I mean, he got me samples but it didn't feel like he providing a service that "deserved" a tip. So, what's the etiquette for tipping at these yogurt, ice cream, or gelato type places? Thanks.