What an interesting question.
I think your question comes in two parts, one is about weddings and the other is about nude events in a meeting house.
The advice from BYM used to be that we should not hold any non-Quaker weddings in our meeting houses. It could create confusion as the venue can be confused with the letting and we could have people thinking they'd heard of a Quaker wedding once where no one was allowed to wear any clothes and have the idea going around that Quaker weddings are nude too.
p.s. I used the word nude as opposed to naked as naked means wearing underwear in old language, so when Quakers such as Samuel Eagle/Eccles went 'naked as a sign' they weren't being quite a lewd as some might think.
I guess naturist events are OK as long as there is no offence taken by other meeting house users and that you have chairs that are easy to wipe down ;-)
I hope some of this helps.
In Friendship,
Karl
Saffron Walden LM
In Friendship,
Karl
Saffron Walden LM