Anambas

You can pitch a tent for free on the sides of the soccer pitch which has a very pleasant grass cover. Just ask for permission at the police. There are no bathrooms but you can just use the bathrooms of nearby restaurants to shower.

As of Feb 2017, there were plenty of mice on all rooms, very dirty.

like a box room without window, basic penginapan, no mouse

You can pitch a tent for free anywhere on the beach. There are palapas you can use as well, even without a tent. There is free electricity and WiFi at the café at the end of the road. The public showers on the beach don't work but you can use the bathroom of the Surau day and night.