just looking for a bit of input on how you'd interpret 'black tie' for a 40th. I read something, goodness knows where, saying something about the more 'stuff' there is at the event, the longer your dress should be. So: dinner & drinks, shortish okay but factor in dancing and you should go longer.
There will be dancing

However! it's not at some fancy schmancy venue but in a marquee in the garden. Which brings it down a notch maybe?
I have long, I have short - so it's no drama aither way. Just wondering which to opt for.
Thanks