How 'bout Are here any vegetarians? or Are here vegetarians? I'm not a native speaker, but saying Are there vegetarians here sound like a nonsense to me
I would say that "Are there (any) vegetarians" is the correct expression. Afaik you cannot leave out "there".
That's wrong sentence structure.
The correct one is "Are there ... here?"
Is тут є always used as a question? "Are there x here?" Or can it also be a statement "There are x here."