Interesting in this context is completely divorced from morally good/bad. Could be any group from any area at any time in history. I’ll start with a few, followers of the cult of pythagoras, contemporary black Hebrew Israelites, antiracist skinheads and the Amish (neo-luddites in general). Don’t be racist or a prick to other people discussing.
No idea what your dad’s like, but I reckon we in the secular west are write off rituals way too easily. They can have lots of value - silly fun not least of all, but also community building and meaning-making.