When four people live in one room, inviting a fifth or sixth person over can be overwhelming. Set a strict "prior notification" rule for any outside visitors. 3. Financial Synergy
If an issue arises, address it within 24 hours. Small annoyances (like someone leaving a towel on the floor) turn into major resentment quickly in small spaces.
If one person is a night owl and another is an early bird, the friction can be immense. White noise machines and eye masks are non-negotiable tools.