"Joan organizes our social life, and on weekends I follow her around"

This quote by Robert B. Parker suggests that Joan is the one who prepares and arranges the social life of the speaker and their group of friends. It indicates that Joan is the leader of the group, and the speaker is content to follow her lead. It could likewise recommend that the speaker depends on Joan for their social life, which they are content to let her take the lead in arranging activities. The quote also implies that the speaker and Joan spend a lot of time together on weekends, and that the speaker mores than happy to follow Joan's lead in their social life. This could suggest that the speaker and Joan have a close relationship, and that the speaker trusts Joan to make the right decisions for the group.