For anyone who's worried about can't bring any food or water, I want to share some tips from my experience watching 2 concerts promoted by marygops
It's true that we wouldn't allowed to bring any food or drinks, but there are people who can succesfuly hide it and bring it
My suggestion is to bring them, at least before you enter Tennis Indoor (before the concert started).
Because you will be in a queue and wait to get inside for some time. You might be hungry and absolutely thirsty. Just bring some bread and water in recycle bottle (like Aqua) so you can dispose the garbage easily (to the garbage can) before you enter Tennis Indoor.
If you want to bring them inside Tennis Indoor, maybe you only want to bring water (because I don't think anyone want to eat while watching the concert or after). It's easier to hide your water if you bring small bottle (you can bring 2 bottle: 1 small, 1 large, n dispose the large one before concert if you think small bottle is not enough). Bring it in plastic recycle bottle (like Aqua) because if you get busted and must dispose of it, it won't be really matter. Imagine if you bring Tupperware and must dispose it.
It's not like I encourage you to break rules. You'll only break rules if you bring food/drinks inside, but while queueing outside, it's okay and you'll definitely need it. Even if you bring water inside, and breaking the rules, I think it's fine as long as you keep the venue clean from garbage and don't throw your bottle to stage, etc.
I'm suggesting this because you will be totally dehidrated, and drinks are extremely expensive during concert. At LarukuJKT, all drinks are Rp 20,000.
Stay healthy and enjoy the concert everyone!!!