In Vegas in the US
Square Enix is holding a special fan festival this year for Final Fantasy XIV: A Realm Reborn subscribers called The Final Fantasy Festival. This year the event is being held in the US in Vegas on October 17th through the 19th, and tickets are $120.
On July 1st if you're an active subscriber of the game you'll get an email from the developer with a special code to input for a ticket purchase. On July 8th at 10:30 AM PST, tickets will go on sale -- the code will expire on July 14th.
I'm really interested in seeing how this turns out, because A Realm Reborn has grown quite a subscriber base since its relaunch last year. There are set to be reveals live at the event, which is good news for fans.
Fan Festival 2014 Teaser Site Launches with Ticket Details! [The Lodestone]