Families that play together stay together. It is good to see families participating in costuming culture, and well, the suits are nice.
Friends and families that play together, whether they play games, music, or costuming, knit themselves into a tighter, more personally cohesive group.
There is a strange comradery that arises among people that work on costumes together, or that have set up individually and met at the convention. Last year at Shoreleave, I watched a Justice League form as strangers who dressed as different DC superheroes met and joined up.
As a former Klingon (I have not costumed in too long), I bonded with those who dressed as my fellow warriors from Klinzhai.
This is modern tribalism, and every social group does it, it is just more obvious in SF fandom. Every group as a set of acceptable hair styles, clothing, and jewelry that sets their tribe apart from the others. It is a healthy part of society, so long as we continue to accept people from other tribes as equally valid members of society.
My tribe dresses in the totemic garb of our legendary heroes and villains and enacts the struggle of light and darkness. This is the ritual and the tribal dance of the post-modern age.
(via Boing Boing here and here [thanks Bill])