The one I pointed to you is not a badminton multi-purpose hall lah!
The layout is similar to a lecture theatre with seats ascending up from the stage to the entrance, and the wall are quite well treated with sound proof wooden finishing or things like that.. I don't hv good pics to show the venue, just let u hv an idea, look at the background of this pic..
That's roughly how the stage looks like, sorry that I dont hv a better pic to show. Went there with my kids to watch a show last yr, and I think it can be adequately dark when the lights are out. There are seats to accomodate around 200 to 300 pple.