Some of my favorites:

Esteemed bastards

Sup sluts

Ladies and gentlethems

Hello everyone

Guys gals and nonbinary creatures

German show host Jan Böhmermann used to adress his audience with “and everyone in between”. Recently he switched to “and everyone beyond”.

I feel like we could drop the whole ladies and gentlemen formula though.

Dearest and gentlest people gathered here today

A non gendered introduction of some kind

To borrow from the YouTube channel Ceave Gaming,

“Gentle ladies, Gentle men, and Gentle people in general.”

My fellow ___,

Dear siblings,

Y’all,

OI CUNTS!!!

“ladies, gentlemen and cyborgs” thanks Zack Friedman

“fine folk and scoundrels”

“those who want me or want to be me”

Lads, ladies, and ladles

I was always partial to kenji alt lopez’ “guys, gals and non-binary pals” phrase

Just “Esteemed guests” or “Distinguished guests”.

Or if you insist, “Ladies, Gentlemen, and everyone else gathered here tonight:”

Yo bastards.

Distinguished guests

I would consider the context to get the correct formal register.

For an event with people of equal station and no elevation of class - “Hello everybody, how are we all tonight?”

For closer friends a simple greeting works best - “Friends! May I have your attention?”

If you are in a close group of Australians - “Oi cunts! Shut up for a sec!”

And if you are in a group including any billionaires just sharpen the guillotine and don’t give them any warning.

Ladies, gentlemen, and beyond!