Hmm... Its kinda a wierd topic to discuss here... Oh well .... Since its here.... Lets see .. IF u wanna be ethical u got to follow what u said before but If i had to decide I would go with 50-50 for rent cause both use 1 room each and may be couple should get the bath attached room cause they are gonna pay more for the utilities.... Yeah... They should pay 1/3 utilities ...cause every1 use utilities..... SO yeah 50-50 for rent with couple in attached bath and 1/3 for utilities...