The worst part for me - places here in NZ are trying to introduce it. I've solved it by not going back, that that doesn't work if the practice spreads.
I also live in NZ. I've seen a few places prompt for tips but typically only in areas tourists frequent. I always just tip nothing.
I'm pretty sure they are just doing it to bait Americans.
Curious, I live in Auckland and haven't seen mention of tips except in 'hipster' cafes and I rarely see gold coins or notes. I wonder if it's less about baiting Americans and more about emulating Americans.
Non solo pizza in Parnell do a hard sell on the tip. Very much a tourist location as mentioned above.
I live in Lithuania and random places are trying to introduce it, such as news agent type of convenience store. "A pack of cigarettes and here's your tip", em, no.