Complex sentence: It is also not uncommon for a fourth guest to be involved.Often guests will be given a cup of water after fighting, ostensibly to "cool off", but inevitably, the guests toss the water at each other, thus resuming the altercation.
Split into simpler sentences: It is also not uncommon for a fourth guest to be involved. Often, the guests will be given a cup of water after fighting, ostensibly to "cool off", but inevitably, the guests toss the water at each other, thus resuming the altercation.