Old white ladies

That's who I'd target first if I was a beggar or a street peddler in Egypt, China, or Thailand.

1. They're probably friendly in general while on vacation
2. They probably have money to spare because they're on vacation
3. There's a high chance they'd rather give you money than be bothered constantly
4. They might have some guilt that you could capitalize on
5. You might be able to get on their soft side easier because you're being cute and they're women

Right after old white ladies I'd try old white men, then old ladies of color. Maybe the "I look like you" factor would work? I could be totally wrong, but this is a result of my experience from walking around.