No delay on arrival of party guests
I'm pretty sure I saw a mod like this somewhere and that it was for Sims 4 (I also play Sim 2), but cannot remember where I saw it or what exactly it was called. Maybe it wasn't even a mod, but a specific line in MCCC, I really don't know anymore. At the time I didn't feel I needed that function, but now I want it.
Basically when throwing a party or club outing, the game sends the guests with a delay and the mod negated that delay, forcing them all to arrive at the same time.