Could you describe the theatre nerd of each house?
Gryffindors give each other nicknames based on their favourite characters to the point where nobody’s even sure who’s who anymore. A group of friends naming themselves after the von trapp children and arguing about who gets to be who ‘I don’t want to be Louisa nobody gives a shit about her!’ ‘well I’m older than you so I have to be Liesl. Sorry I don’t make the rules’. Will defend high school musical to the death.
Slytherins have to sit through weeks of failed high notes because there’s no way they’re going to let this song beat them. Their friends all breathe a sigh of relief when the finally belt out the entirety of defying gravity without a hitch, because they actually really like that song and it’ll be nice to hear their friend make a good job of it. But naturally as soon as they’ve mastered the song they move onto something else that’s equally challenging and everyone buries their heads in their hands because you know nothing about rap and there’s no way I’m yelling lafayette for the next few months just so you can butcher guns and ships
Ravenclaws are a nightmare in the common room because when a group of them decide they like a show there will be nothing else playing for the next few months. Parts will be divided up and a fully fledged orchestra is likely to emerge to accompany the students. Ravenclaws tend to be particularly fond of layers and musical themes (when they discovered les mis it was commonplace for a rousing chorus of one day more to spontaneously occur at least once a week)
Hufflepuffs all meet up in London over the holidays to try and see as many shows as they can, because nothing beats live theatre. They love seeing how muggles can put on such spectacular shows without magic and absolutely fell in love with the puppets of war horse (though they had to chuckle at the supposed ‘magic’ in wicked). They’re also big fans of theatre that talks about current issues and staged an ‘impromtu’ performance of la vie boheme in the great hall one night. They all ended up in detention but the smile on dumbledore’s face suggested he secretly approved