From Tekkenpedia

Poolside
Walls	Yes
BG Music	Poolside

Poolside is a stage in Tekken 5. This stage is set out in the summer. There are swimsuit-dressed women all around the fighters. Lee Chaolan can also be seen in the crowd (unless he is fighting in this stage.). There is not a single cloud in the sky. Techno-esque music is playing in the background.

Note: If you and your opponent fight repetitively at one spot near the edge of this stage, you will soon scare the crowd, making people run away screaming. The same thing happens if you or your opponent cause a wall splat where the crowd is standing.