There is a micro-phenomenon of new wave, special snowflake directors that try to revolution the canons of classical opera. I saw Carmen being banged behind a burning car next to what looked like a flamenco-infused Thunderdome. That was in Paris opera, stronghold of modernist SJW nonsense.
Here, the expression is a shorter version of matriculation college. In a number of Canadian cities, many government-run secondary schools are called collegiates or collegiate institutes (C.I.), a complicated form of the word college which avoids the usual post-secondary connotation.
The first subculture is collegiate. The collegiate is defined as focusing on having fun and socializing. These students define what constitutes a reasonable amount of academic work. Members of the collegiate subculture have little commitment to academic pursuits. (Schaefer) It is hard to stay that any one college student is not a part of the collegiate subculture.