Buy a ticket and join the crowds at a game at Phetch Buncha Thai Boxing Stadium. If there's nothing happening while you're in the area, you might like to check if the stadium offers a tour of the facilities.
You'll have sightseeing choices galore when staying in Chaweng City Center. Phetch Buncha Thai Boxing Stadium is an ideal place to begin here, but there are lots of other fine sights to consider. Big Buddha Statue, Hin Ta and Hin Yai, and Namuang Waterfall 2 are not far from the sporting facility and will fill in your day nicely.