Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Ex Input:
I have never been to Istanbul but I am planning to go there with the kids. A friend of mine showed me yesterday a video of him buying ice cream from a traditional ice cream shop in Istanbul. He insists that it's a must for the man to do the usual tricks/troll with you before handing you your order.

I don't like that but I don't want to sound rude especially in front of my children. Is it a must from their culture point of view? can I avoid that? 

The Wikipedia page for Dondurma doesn't mention anything about it.


The video is here


Ex Output:
Is it rude to tell the ice cream man in Istanbul not to mess with me?


Ex Input:
As an example I've recently been to Paris and the level of credit card adoption there is so high I didn't once need to take out cash. I likewise assume many of the locals avoid cash altogether and only pay by card. 

But what's the etiquette in places where tips are common, like bars and restaurants? Are you supposed to keep cash just for the tips? Or is it up to the waiter/barman to offer you a tip option on the card terminal? I've tried asking the wait staff if I can leave a tip by card but they either misunderstood me or their POS terminal didn't have such a feature. 


Ex Output:
Are cash tips still expected in cities where nearly everything is cashless?


Ex Input:
I am in Maple Shade, New Jersey and would like to visit Niagara Falls, NY (US side) by this month, after which it will get very cold and I would wait till the summer next year. 

Will the fall have enormous amounts of water now, like it has during the summers? We are planning to take the Amtrak train to go there as it is 8+ hours drive from here. 


Ex Output:

Is the amount of water going over Niagara Falls very different in September compared to summer?