Scottish "clubs"

Depends on your point of view.

some examples

pejorative: gang, rabble
neutral: group
approving: club, society, association

As far as I know, in Scotland, gangs are generally called "gangs". A notable exception is the Burns Society If a bunch of "neds" are vandalising your neighbourhood, you might well refer to them as a "gang". In the 1970s the Edward Heath Conservative Government referred to the Northern Ireland IRA as a "murder gang". However, I don't think that either the neds or the IRA would use the word "gang" to describe themselves.

Maybe members of a marginal informal grouping would call it a "club" because it sounds nicer?

I thought an Irish club was called a shillelagh.

they are known as gangs aswell, not clubs.

also, you cant call neds a gang either because that would just describe the fact that there are a number of them togther.