BARG's w i d e o p e n s p a c e is an afternoon of fun, games and picnics around the Curzon Street area of Birmingham, including Bocce Drift, The Lost Sport of Olympia, Human Snake and a hat-based variant of Lumenatio. There's a suggested donation of at least £3 to help fund future BARG events.
This looks like it was pretty great - so far there's some photos up, plus someone's writeup here. No idea how to make those hats, which look a lot less uncomfortable than the original Lumenatio swimming caps.
Pindec is the Hat Meister, but they're basically your bog standard paper hat (http://www.instructables.com/id/How-to-Make-a-Paper-Hat) fitted with "an anti-wind mechanism" so as to preserve hat integrity. (Yeah, ok, pieces of string...). There were also a few extra details in the folding and the number placement to reduce wind effects. Hat-testing was done before the event!
The event itself was great - good weather; good fun; about half the players were people we'd never met before; really positive reaction to the spaces we used; strong interest in more of this sort of thing; and, by the end of it, a foregone conclusion that we'd all be doing it again!
Oh, that's just the inherent sartorial splendour of the average Brummie making the hats look good :)
I need to email you to sort out sandpit/emergent game stuff (hectic week coming up, will try and do it soon) and then once those dates are confirmed/otherwise we (other we: BARG we) can plan the next few BARG events around various commitments coming up - you're welcome to join us any time!