I can talk with anybody - and I have been to huge parties with big name celebrities and started conversations (no, not as a “fan”, just a guest) as well as striking up a conversation with the catering staff. Seems easy and I don’t understand why others have a problem doing so.
I have never had a problem in a crowded bar going up to someone and introducing myself. I can pretty much talk to the scariest of gang banger in the street, to the CEO of a large corporation with no problem. Maybe it is because I grew up in a political family and sort of inherited the gene that allows me to speak with anyone, any time.
Maybe it is the “been there, done that” syndrome, but I now prefer to stay at home with my SO and not have anybody over to the house, nor go to anyone’s house for parties. I rarely accept invitations to parties anymore - not because I am suddenly anti-social, but they just aren’t fun for me anymore.
I am sure if I ever had to go to a party/club/gala/event of some kind, I would fit back in like a duck to water and mingle easily. I just prefer not to anymore.