I actually favor BAT as a first guess. Of course, I'm not very familiar with the other kind of nightlife.
If we decide the clue is going exclusively for the nocturnal party scene, I favor COVER, GLASS, SUIT in that order. Roulette can be played any time of day and, for me at least, isn't associated with the party scene.
If we decide the clue is going exclusively for the nocturnal party scene, I favor COVER, GLASS, SUIT in that order. Roulette can be played any time of day and, for me at least, isn't associated with the party scene.