instruction:
Given a travel related situation, and given a specific question about the situation, summarize the question into a title
question:
I'm 15 days into a 30-day trip all across Greece (Athens, northern mainland, islands). Everything has been great except the long wait each time we are ready to pay our bill when we're out to eat or for drinks. In America, cleared plates or a credit card/cash sitting on the table is an indication that we are ready to leave. Here it seems they are in no rush at all. We've even waited 20 minutes (they weren't busy). They print the tickets and bring them out immediately but take much longer to take payment. Multiple times we've had to walk to them - which feels a bit rude.

My question
How do I more clearly indicate that I am ready to pay and leave?
or
Am I just being an impatient American not attuned to the Mediterranean pace of life?

answer:
How do I convey that I'm ready to pay my tab in Greece?


question:
One of the guests at my hostel here in Georgia is a young guy from Nigeria and he asked me if he needs a visa to go to Turkey.

I did some searching on the Internet and found conflicting answers:

The article Visa regulations lifted with yet another nation on sabah.com.tr says:


Nigeria is the newest addition to the countries in which visa regulations will be lifted with Turkey.
  Foreign Affairs Minister Ahmet Davutoğlu and Nigerian Foreign Affairs Minister Olugbenga Ashiru will be meeting at the Turkey-Africa Partnership Ministerial Review Conference and will sign a joint agreement to lift mutual visa regulations.


But the Turkish government page, Visa Information For Foreigners says:


Nigeria: Ordinary and official passport holders are required to have visa to enter Turkey.


Is the Turkish visa page current or out-of-date? If the agreement is not yet in effect can anybody tell me when these new rules will begin?

answer:
Do Nigerian citizens still need a visa to visit Turkey?


question:
If I stamped my passport for an international flight as we usually do before international departures and then I changed my mind for any reason, for example a family emergency reason. What's the process to cancel the stamp and leave the departure area? 

answer:

After passing through immigration at the airport, is it possible to cancel the stamp and go back?