Where and why do raids happen

This is gonna sound v classist but pls hear me out

My friend and I want to clubbing to this club called quake arena and we are getting free entry, I wanted to pay for it but my friend said she can get us free entry which I find a bit weird but whatever, so here’s the thing my parents only let me party with my hyd local friends and that too in a club where there are known ppl cause they are protective like most parents, w these raids happening often they are v particular about this, im going clubbing with a friend who isn’t from hyd and my parents don’t trust her much, so I j wanted to if any raid could happen at this club or why do raids happen