Rock Band Rivals is a music game. The below description is also applicable for Rock Band 4.
SEX: One song contains a reference to rough sex and another song contains a reference to masturbation.
DRUGS: Rock and Roll Hoochie Koo contains the line ‘I’m getting high all the time, I hope you all are too’ and That Smell contains the line ‘There’s too much coke and too much smoke’, and ‘Stuck a needle in your arm, So take another toke, blow for your nose’.
OTHER One song contains the word p*ss.