Yes, I agree sometime folk can be prejudge mental but also believe it's in our nature when in a social setting to find our genetic position within the group. There's nothing wrong with it & we all have different personalities.
Well - can only say I've never seen this at LMP - an alpha male seeking to dominate the shagging. How I, or any other guest would be able to spot it "at every party" is beyond me. LG, Westminster, and the new venue all have 3 party rooms, and at a busy party it takes Em and another person to keep an eye on them - because even Em with 10 years experience cannot be in two places at once. And the party managers are not even doing any shagging.
I'd heard from LMP regulars of someone occasionally trying to be alpha but it seems very rare, and even though I've been there many times it's not happened in my presence.
It would be fun to explore how this spidey supersense of yours works, but in the end, you're not going to convince me though it appears you have convinced yourself. Anyway punting is a broad church, as is this forum, and I hope you enjoy your participation in both.