What Kim Said.
For a man to go to a hetero-based vanilla normal dating event as a woman is deception, pure and simple. If I were at such an event looking for a woman, and I took home a man by mistake, there would very likely be violence before the night was up. If I met a woman at the same event who immediately told me she was really a he, I'd ask what the **** are you doing here?!? And I'm sympathetic to the cause, so just imagine the reactions of "normal" men.