Time Out says
We know, you're still waiting hopefully for that acceptance letter sent to you via owl to let you know you've finally made it into Hogwarts. News flash: That's never happening. But this is the next best thing! PotterCon is for all you Potterheads out there who have since come into adulthood but would still wear your wizard robe with pride. There will be butterbeer, costume contests and of course a chance for you to be sorted into your witchcraft-and-wizardry house. Gryffindor, anyone? Or maybe you're more Hufflepuff. Go find out at this Muggle mingle for grown children in honor of the Boy Who Lived.