So is there an entry fee?
This is just an "initial get together" - an attempt to see what the group is, who will show up, etc. There is no "fee" or "dues" - just show up. We may discuss such things as membership fees or dues, formalities, etc - though I really think that should be something for a future meeting perhaps.
Or is it just the profit they make from selling coffee?
The coffee shop is -not- a part of this get together; I simply called them, asked if they would mind if we got a table, and that was it. I am -asking- that attendees purchase their product as a way of saying "thanks for letting us congregate here". They are, after all, a business first, and they don't know us from Adam, as the saying goes.
Also, what exactally do we bring?
Well, first and foremost, bring yourself and your ideas about what this group should be.
If you want - I can't guarantee if there will be outlets enough to use (or if there are any period!) - so make sure it is fully charged.
If you have one or a small project which uses one, certainly.
Ultimately, I would like to focus on where and what this group should be; whether it should focus on the Arduino exclusively, or become something more open, such as a hacker space or a robotics-oriented group. Or something else that I am not able to think of. To this end, it would be best if you only brought yourself and your ideas - but if you have something cool to show, or a major question vexing you that only having the physical project with you will help (and it isn't too big) - then bring it...
Remember, though, that this is a coffee shop with regular customers; we don't want to chase off those customers by being too loud or outlandish or obnoxious - which I don't expect anyone to be, but having been a part of a group back in the early 1990s that was banned from Metro Center and the Barnes and Noble at that same mall, I know how this sometimes happens. So we need to respect the business we are using for this small gathering (or at least, I hope it is small! I mean, I would welcome seeing 100+ Phoenix Arduino fans, but it would make for a uncomfortable first meet at a small coffee shop at the same time!), and thank them for being so gracious as to allow us the use of their space.
Perhaps also as part of this meeting we can decide to either continue meeting there (and depending on the size of the group, paying the fee to meet in the conference room), or decide on another place to meet next time.