We have one ritual in my new job. Every other Friday afternoon, one of us has to present a non-work related topic of its interest (usually 10-15 minutes). There is no limitation for that and we can cover whatever we want. The only detail is we usually bring a couple of nerf guns so things can get crazy in one way of the other. Anyway, it’s really good fun. I recycled an old presentation for my first round so no big surprises there (it’s also a subject I covered so many times in my previous jobs).