Traditional veggie here, i.e. I eat dairy, eggs, etc. but no meat or fish.
It's tricky. If people want to eat meat, that's fine with me. Their choice. If people want to be vegan, also fine, also their choice.
However as a veggie, I'm beginning to get fed up of vegan food being the default veggie option. I don't want vegan cheese, thanks!
So a fair balance would be one meat dish, one veggie option, and perhaps a crowd-pleasing vegan option, e.g. a veg curry or similar.
I realise vegan food can be healthy, but much of the 'corporate event' type vegan food isn't - it's often highly processed and full of salt!
But experience does tell me that whilst veggies and vegans will take what is offered, meat eaters do like to have a choice of meats.
But I could be wrong!