Coming back to this thread.

A four hour time limit ~ four consecutive hours is usually not good for even one player. Trying to balance 16 players, even on a weekend, isn't an idea I can agree with.

From companion/spouse-aggro, kid(s) aggro, pet(s) aggro, 5-minute power flickers, an overrunning toilet that needs your attention, computer flaking out, staying up unhealthy late, limited smoke and chocolate breaks, having headset on for four hours, talking for four hours (leaders, co-leaders), toaster-aggro, random game crash, random disconnect, underwear durability reaching 0, etc.