I've never seen two strangers playing rock-paper-scissors to settle an argument.
Why would my character play this game with a door guard in order to let him open a door for me which he's supposed to guard?
If I was guarding a door and someone asked me to let him in, I sure wouldn't start a game of RPS with him.
The RPS minigame is one of the few things that really bother me in this game.
The game should handle these arguments on its own, without a minigame, with a higher rate of success based on the value of your charm.