Currently there is no multiplayer function but the game developers are still exploring multiplayer options. The only social part of the game occurs when battling for control of a Gym. The game does not allow for players to play their friends, however we expect to see some additions to functionality in the future.
Users can go to Gyms to train or battle other Pokémon. At a certain level players will be asked to join a team which will then give them the ability to assign Pokémon you’ve caught to open a gym. Users must travel to the gym location to use it, if the gym is the same colour as the players team the user can train in that gym. If the gym is another team colour, users can go in and battle for control of that gym.