This smallish London square is the site of most British film premieres and the square itself is surrounded by terrifyingly-expensive cinemas - tickets for an evening screening will cost upwards of £17. 3D screenings will cost upwards of £15. At night, Leicester Square becomes exceptionally busy with tourists and locals, visiting the surrounding clubs and bars. In the north-west corner of the square is the Swiss Centre - unaccountably popular with tourists, the building is nowadays home to Sound nightclub, and boasts a carillion in the corner which depicts a Swiss mountain scene and plays tinny versions of Beatles hits on the hour throughout the day. The TKTS half price ticket booth is on the south side of Leicester Square for cheap tickets for theatre performances.