[I](OUTCOME: 50% success. I bonked only one, but there is a story to tell.
We leave Newton, take the bikes, and once at Formosa I happily observe them parking the bike and following me to my room without saying a word. Yes, without me mentioning or proposing anything, they follow me up to my room just saying "Oh-so-tired-we-want-to-sleep".
Once in my room, PROBLEM: they get very nervous and start to play silly. They say they want to go home and come back to my room dressed normally at 9am, because they say they are afraid of "police razia" during early morning for girls "not wearing the islamic way".
That story is so laughable, that my internal "cheat alarm" turns on red. It happened to me before to bring back "bad girls" to my room, who just tried to get money for nothing etc. There are also stories (I don't know to what extent they may be "urban legends" or true) about girls who hide extasy in room to call police, get the punter in trouble and then share the bribe.
I start to think that they could have just wanted to enter my room to steal something. Unbelievable for me anyway, because I know who are they and where they work.
No reason to insist. You don't want to stay? OK BYE. Before sending them to the door, I check discretely all my belongings, money, cell phone, etc. etc. Everything looks ok.
I close the door, I go to sleep and I forget quickly the incident.
(Follows to Batam on Ramadhan 2015 #3a - THURSDAY MORNING)