6 Then you say, “And all his pomp.” Now the pomp of the devil is the madness of theatres, and horse-races, and hunting, and all such vanity: from which that holy man praying to be delivered says unto God, Turn away my eyes from beholding vanity. Be not interested in the madness of the theatre, where you will behold the wanton gestures of the players, carried on with mockeries and all unseemliness, and the frantic dancing of effeminate men —nor in the madness of them who in hunts expose themselves to wild beasts, that they may pamper their miserable appetite; who, to serve their belly with meats, become themselves in reality meat for the belly of untamed beasts; and to speak justly, for the sake of their own god, their belly, they cast away their life headlong in single combats. Shun also horse-races, that frantic and soul-subverting spectacle. For all these are the pomp of the devil.
Source: Catechetical Lectures (New Advent)