Dancing in the club (Grand Theft Auto 4)

People, how is it normal to fill the indicator on the dance floor so that the mini-game starts? Dumb music. Okay, if there was a beat. And here there is a beat, and hit, and a deep beat, and a sliding beat, and a multi-beat beat, and the music changes, and the rhythm is different. Try to guess. On a quick click of the mouse, the indicator reaches almost to the limits, and this is not always the case. Now the rhythm falls on the left button, then on the right, then on both buttons. Both buttons, as I understand it, get a deep beat. And how to understand which rhythm beats on the left button, and which on the right?
Is there a normal passage of the dance or is it stupid for luck, will it work or not?