[throw101010]

In a business/formal context it would be normal to introduce yourself like this in the countries you've mentioned.

Do people introduce themselves like that in informal contexts in the USA? If so that's indeed a bit weird, and more a topic you would start talking about for small talk or if someone asked about it.

[endemic]

I would find it strange if someone introduced themselves to me with their business title. I sometimes ask "what do you do for a living?" as small talk, but that's solicited.

[ryandrake]

Even when it's solicited, I think it's weird. I don't tell people what I do for a living when I introduce myself. And when they ask, I tell them I'm an exotic dancer. It's a silly joke (since I'm a fat 50 year old) that tends to break the ice and lighten up the conversation. In general, I think small-talking about what you do for a living is not really interesting to people, and just allows them to silently put you somewhere on their mental totem pole of importance. Better to talk about actual interests.

[dopidopHN2]

Depends on where. In big city yes

[abraxas]

Americans don't usually have friends. Just "contacts". Working age "parties" are often just cloaked networking events.

[stuxnet79]

Not sure why this is being downvoted. It is very much true in my opinion, especially so for the big coastal metro areas.