So, I know a couple of LARPers (no names). LARPing (google it if you don't actually know what LARP is) does by definition include a bit of acting and sleuthing and problem solving etc etc. Where as COSPLAY seems to just be dressing up.
Picture from here
COSPLAY is popular in Japan, we know. And it always seemed to me to just involve dressing up as an anime character. But things evolve.
Idly browsing the interweb I came across these:
Pre enacting the guard
Young lady in various costumes
I used to not care for such things. But upon reflection, these sorts of things are, perhaps, as much part of the 40k hobby as building an army of little resin, plastic, metal and failcast men. It certainly takes dedication and effort to craft yourself a proper costume and then a dash of chutzpah to actually wear it somewhere. All good stuff, IMHO.
The browsing showed me a remarkable quantity and standard of artwork out there is quite breath taking. Which had be thinking about the origin of it all; If you google 'John Blanche' there are a number of blogs and 'sites devoted to show casing the Grimfather's work.
And whoops there goes another two or three hours. Oh well.
Anyway. Here are some more people all dressed up: this time from Salute.