Dancing - Grand Theft Auto 4: The Ballad of Gay Tony
Visit either of Tony's nightclubs (Maisonette 9 or Hercules) and partake in the dance mini-game by approaching the dance floor and pressing the LB button when prompted. The clubs open at 9:00 p.m. and close at 6:00 a.m. (Hercules is just up the street north of Maisonette 9, along the east side.)
At each club there are two different types of dances: a partner dance and a group dance. To participate in the group dance, you must complete the partner dance first.
Do well enough during the single-partner dance to move on to the group Bus Stop dance.
To complete the partner dance, you must fill the circular meter in the bottom-left corner of the screen completely. To do so, simply move both the Left Stick and the Right Stick to the beat of the music. When “Hold” appears below the meter, hold both the Left Stick and the Right Stick down until a number appears on the speaker. Tap both LT and RT to the beat as the numbers count down to fill the meter. Continue doing this until the meter is full.
If you did well enough during the partner dance, you'll move on to a group dance. To complete the group dance, you must press the correct buttons as they appear. Focus on the bottom of the screen and move the Left Stick in the direction indicated, or press the face button indicated. You don't have to press the button immediately or anything, so go at a steady pace to avoid messing up.
Unlocking the Catch the Bus achievement.
Complete the Bus Stop dance at both Maisonette 9 and Hercules without missing a single button press to unlock the Catch the Bus Xbox 360 achievement.