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

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