This isn’t a larp idea as such, but larp-related. It came up in this thread as a fundraising concept for NZLARPS, which I think would be a good role for it.
The concept is big public Auckland event called something like a Time Traveller’s Ball but really mixing together a lot of event concepts like a costumed dance, a fancy dress party, a costume competition (potentially with contestant catwalk, judges, prizes, etc), live music, multi-themed venue and staff, kooky entertainers, etc. Events might also draw people into various sorts of pretend play (it’d happen naturally anyway with everyone dressed up, but could be encouraged). With professional large-scale organisation, aiming for hundreds of people from the start and growing year to year. Basically I picture it as large-scale indoor-festival surreal liminal interactive craziness, a kind of break from reality and inhibition-reduced social mashup. Somewhere with an alcohol license, potentially with some food either included in tickets or purchased separately, etc.
Just thought it might be fun to kick the idea around a bit further here and see if it goes anywhere.