Found this video lurking around:
It was uploaded by the official JKT account apparently. To quote from the description:
It was really an honor for JKT48 to be able to do a social activity along with fans in last ramadhan. The members we're having all sorts of fun activity with the fans including dinner, wacthing videos and a few games with the fans. All donation that we're gathered in this event is donated to a foster home.
Bringing this up because I really like the format of this activity!
It seem to me the members can really engage with fans here, bringing out the true spirit of "idols you can meet." Certainly it would be nice if the family groups in Japan can follow this through imo.

It helps that members themselves are playing the instruments & singing live too (& the fact I always like acoustic version of song it seems)!

What do you guys think? Should AKB & co follow up on this kind of format? Is it even economically viable?
Personally my answers are yes & yes, as it allows closer members-fans engagement for one, & there will always be some lesser known members with the time & energy to commit to this kind of activity for the second one. Love to hear what you guys think thou!