Our story is a little dorky but sweet - it's also very long so if you're interested on hearing about WoWers meeting up at the precisely perfect time, send me a PM. :)
Hey Jess...I have heard of people being able to. I would suggest if you live close and it doesn't cost you time off from work to give it a try. But if not, I can tell you going any time the day of they will accept. We went in hours before the time on the sheet and we were fine.
