Just sounds like your "other roommate"'s idea of what is fun was in different alignment from theirs. Rather than accept different tastes an attempt was made to

Just sounds like your "other roommate"'s idea of what is fun was in different alignment from theirs. Rather than accept different tastes an attempt was made to coerce them (by use of negative language - "why not just play for fun") into playing for the same purpose he did. Unsurprisingly they found a way to have fun despite being forced into a new playing style.