[jneal]

> The game limits multiplayer interaction big time. It's no more than 3 parties allowed in an instance at any one time

Just one quick correction. Destiny 1 limited instances to 3 parties, but Destiny 2 changed that up a bit. Patrol areas are now 5 parties (up to 15 players) and social spaces are 9 parties (up to 24 players).

[RussellDussel]

Social spaces work differently to patrol areas. 1 player won't occupy a full party worth of spots in a social space, it's possible you try to join your friend at a social space and get an error that the area is full.