As said, Zanzibaris are very tolerant, they will let you exist in peace regardless of how you look, your gender, sexual orientation, religious believes or nationality, they just don't care. I know of trans people spending their holiday here without any incident, at most it was just their taxi driver being curious but at no point they felt unsafe.

Don't abuse their tolerance and respect their customs. The same way you'd expect someone to respect you and your house rules if you invite them home. You just have to accept that people live differently in different parts of the world, maybe it's not them that are intolerant.

I'm convinced a global tech event can be hosted in Zanzibar where everyone is welcome and safe.