Movies with underworld rules are weird.
A bunch of criminals come together in a hotel or bar, and the hotel/bar has rules. The criminals obey the rules.
And invariably, the criminals stop obeying the rules, and people are shocked.
It’s especially weird when a bunch of assassins come together, in the assassin bar, and suddenly they try to kill each other.
Like, they’re assassins. They’re in the assassin bar. This is the most predictable outcome.