Some people's cultural practices do a better job at facilitating effective interaction among large groups of people, especially when not everyone knows each other very well, or when the specific people involved may vary from week to week. These cultural practices basically boil down to communicating about the thing that you're planning to do, and describing it accurately, instead of distorting it based on a certain convention (e.g. if you say that we start at 9 but everyone shows up at 10:30 instead).

Timeliness and running businesses effectively go hand in hand. (A contributing reason to why the Anglosphere and its close friends are the prosperous cultures in this world.)