I should add that I've played around with this stuff before. Doesn't matter how long you stoke the online attention ho's ego, she won't go out. Could be one back and forth messaging, or a dozen. Soon as you move to bring it into the real world, she'll either stop responding or say no, flake, etc.
Also any chick that posts contact info on the free sites is either desperatly fat, a hooker, or spam.
In addition to coffee places (haven't done tattoo parlors, its not my scene) I'll also invite to a local bar for a beer.
What i've noticed is the best formula is this:
* Opening message
* Her response
* You respond
* She fires back
* You send coffee request
* Set up date/time
If they are responding quick, I usually get IM instead of coffee request and make sure to (or at least attempt) set up a date. Chances are you won't IM them again, and if so, you're steeply rolling down the hill.