I want to debate about alternative medicine and general 'woo-ism' with all my housemates
Are you trying to irritate your roommates?
Maybe a bit.
A wide range of conversation topics keeps things interesting. Don't be an ass and aggravate them on purpose, though.
Too late, I already started and I'm bored of their conversations.
Try to be civil and keep their opinion in mind. You can learn a thing or two about why they disagree.