Outdoor macro is hard enough in the daytime with a close-up lens' extreme shallow depth-of-field. It requires very precise focus. At night, at the pasar malam, it can be a nightmare.
I not only need to light the subject but also to handle the side effect of a curious crowd attracted to the lights like moths to a flame.
Is a challenge but doable if you can find a stall with tables. The 'assam laksa' stall usually has some tables and chairs to dine in. They won't mind you shooting other food there provided you order from them, and explain what you are going to do.