For me, I go to listen to the selection of Indonesian musicians on display. At no point in time each year, except maybe at the up-n-coming JakJazz festival, can you savor live music from Indonesia's best.
Below is one such artiste who performed on one of the many stages at the Jakarta Convention on the first day. He's Joeniar Arief. He's more of a R&B dance performer. Unfortunately, where he performed, the sound system isn't that good.
I also caught a glimpse of Gigi's lead guitarist, Dewa Budjana, who is also earning a reputation as a top jazz guitarist. I could tell you more, but really, you should just make it a MUST to go attend this festival or if not JakJazz. It really is worth your time and money if you are a fan of good music. Below is one of Joeniar Arief's many music videos available at YouTube.
The above is a clip of Dewa Budjana at one of his earlier concerts.