Use of Parents Club

[Unregistered]

We are starting a typical elementary school parents club. Which is the proper or best use?

1) Schoolname Parent's Club
2) Schoolname Parents' Club
3) Schoolname Parents Club

We want all our documents to be consistent and correct. Thank you.

[IvanV]

We are starting a typical elementary school parents club. Which is the proper or best use?

1) Schoolname Parent's Club (Only one parent in the club? I don't think so. )
2) Schoolname Parents' Club
3) Schoolname Parents Club (At times acceptable, but not quite correct here. Use the second example! )

We want all our documents to be consistent and correct. Thank you.

I.