How do you spot a LAFer at a convention?

Crisis 2016 will be my first wargame convention and very much looking forward to it. I was wondering is there any social meet-ups by attendees before or after it? I was thinking of checking out the Outpost gaming store...or else a good Belgian bar. I am heading over from Dublin with a friend and we are going to take in the Ypres Salient and then get the train to Antwerp.
Oh, and any tips for train tickets if we are going to using trains 3 days over the 5 day-trip (Brussels - Ypres/Ypres - Antwerp/Antwerp - Brussels)? Would a book of 10 tickets between us work out better than individual tickets, does anyoen know?
Regards,
Warren