If you're "thirsty," alcohol won't fix that. Water does, and water is
free. If you "want a drink" and you want to get tipsy, buy yourself
the drink. She doesn't know you, you take her picture (with you in
it), then ask for money and then a drink, you get neither... how is
that better?
She doesn't know you and doesn't want to buy you a drink. If she does,
she's buying you a drink because you've conned and guilt-tripped her
into it, getting her to think that somehow, she ACTUALLY does owe you.
You think that she should actually owe you already?
If "all you want from her is a drink," do us a favor and find someone
else. Getting "some girl" to buy you a drink when you really have no
interest makes you the type of PUA that bouncers want to kick out of
clubs... why? Because it's taking advantage, and you should see it
that way, too.
Lastly, I'm not "implying" that you should tell her to that she/they
owe a conversation, I'm saying that that's what you should say,
outright. Or you'd rather stick with the handshake?
We don't ask for things from people we're not going to return value
and investment in, and trust me, I'm pretty vain myself, but no girl
should owe me because I got in her picture. That's as much for me (or
in the case at hand, you) as it is for her/them, and thus, it's
classified as mutual-investment.
Your post hints at the type of game that's developed by PUAs and
wannabe's looking to "score," to "win" and get something from the
girl... the "get something for nothing." If that's not the case,
please explain. If it is the case... well, you should know that that's
not what we're about.
While you're testing out material, buy your own drinks, unless someone
explicitly offers you one without any suggestion from you. If you some
day do end up with mad skills, you'll be RESPECTED as well as
admired... those whom take advantage of women (even in small~ish ways)
may get bragging rights in the seduction forums, but they're hated by
women and eventually, likely to get crushed and blown out by a better
man. A guy willing to buy his own drinks; take the woman out on a
lovely date, and take pride in his lifestyle, knowing full-well it's
worth more than a free drink here and there while being hated almost-
everywhere.