The RedHen Membership module provides a framework for managing individual (Contact) and organizational memberships. Optionally, you could assign user roles to Drupal users associated with active individual or organizational memberships. Memberships are a custom entity type/bundle. Therefore, memberships can be extended with additional fields.

Configuration

First, decide if you want to associate Drupal user accounts with RedHen Contacts. This is not a requirement for managing memberships. However, if you want to apply Drupal user roles to user accounts associated with RedHen Contacts, you need to enable this option at: Configuration > RedHen (/admin/config/redhen).
Second, decide if you want RedHen to manage membership activation/expiration dates programmatically at: Configuration > RedHen (/admin/config/redhen)
Then, create and configure one or more membership bundles at: Structure > RedHen > Membership Types (/admin/structure/redhen/membership_types). Optionally, you can select a Drupal user role to be assigned to user accounts associated with Contacts entities that are associated with active individual or organizational memberships.
Note this cascade. If an organization has an active membership that is configured to apply a Drupal user role. All Drupal user accounts associated with Contact entities that are, in turn, associated with this organization will receive the Drupal user role.

Usage

When looking at a Contact or Organization entity, go to the "Memberships" tab.
Click "Add membership." If more than one membership bundle is available, choose the type of membership you want to create.
Optionally, enter the start/end dates for the membership.
Choose the "state" of the membership. "Active" memberships will apply the associated Drupal user role(s).

RedHen Membership

Issues