jedni? masculine plural version of jeden

Could anyone tell me when you would use the masculine plural version of jeden, i.e. "jedni" in Polish? I realise that "jedne" is used about plural only objects, but I can't seem to think of a situation where you would need an actual plural form for one single person.

Jedni i drudzy.

That's plural.

Jedni lubią słodycze, drudzy lubią owoce, jeszcze inni piją kawę. ;)

Jedne dziewczyny chodzą na aerobik inne są grube.

"They're arriving in ones and twos."

I mean "jedni" as in a cardinal number (liczebnik główny).

Oh, I realise now "jedni" can also mean "some" as in "some of us like..."

"Come in ones and in twos"

That would sound very weird to me if it's about people. Is it really possible to say like that? And I thought I knew English. ;)

Only jedno could be singular. Jedni and jedne are plural.

Yes, but it still refers to the number "one". I'm not talking about ordinal numbers (liczebniki porządkowe).

As for Jonni's example, "ones" would be a noun. I was wondering if anyone could make up a sentence where "jedni" would be used as an actual cardinal number (masculine plural) and not as a pronoun or anything else.

"Jedne drzwi" is straightforward enough, but for masculine plural? Jedni...?

Jedni lubią słodycze, drudzy lubią owoce, jeszcze inni piją kawę.

You could just translate it to:

One group of people , second group of people, and others ; )

Jedne - plural for things, animals and... women
Jedni - plural only for men (and people, because same people are men)

Jedni may be confusing. When jeden/jedna/jedno transforms itself into jedni/jedne, it looses its sense of a cardinal numeral; it becomes a plural noun with the new sense of ci/oni. Drudzy/drugie acquire the sense of tamci/inni.