Cirkle is inarguably the best social networking WordPress theme that you could go with. The theme is based on BuddyPress, which is the top plugin for WordPress social networking websites. Cirkle has many features that make it the best for any social networking functions you may need. It has a clean and modern layout that combines with amazing versatility to put it at the very top.
Demo: https://themeforest.net/item/cirkle-social-networking-wordpress-theme/35127441