A country club can be very private, very expensive and very exclusive, capping membership at a small number (say, 250). Or a country club can follow a semi-private model for its golf business, giving its members preferential tee times but also allowing non-members to play the golf course.
For non-members, access to a golf course that is part of a private, exclusive country club is usually only possible if you know a member. Most country club, no matter how private, do allow non-members to play their golf course if they are guests of a member.
Related FAQ:
What are "reciprocals" at country clubs?

