Almost all men have a penis so that's a straightforward starting point if the person you are talking to is male. It really isn't bigoted to have a sexuality that doesn't include male people.
Grindr interactions apparently get to how many inches each party can offer quite rapidly. I know there are gay men who will happily date transmen but I am going to go out on a limb and say it's a small minority.
What is true us that there are a lot more bisexual people around than people used to think. I'm also perhaps unusual kn MN on finding pansexual quite a useful definition, and pansexual speed dating would be fun imo. However, anyone who genuinely thinks that lesbian speed dating events should have to include males is a sad homophobe tbh.