Passably tolerable brothers hanging out? It'll probably involve some bickering because...honestly it's Richard there's like two people who can deal with him and not bicker and EVEN THEN. Honestly though he wants to try and build some sort of truce because it's still his brother and he's trying to do this 'decent guy' thing. Also he wants John to meet Alex and he will pay John to be somewhat nice.
John should come jousting, it's the ridiculous pasttime Richard thinks of as a bonding experience.