I doubt that anyone will bother to check the pairs of tourists who, although for the sake of formalities, entered the country separately, but walk and sleep together. I know about the conservative nature of this country, but we all understand that any ideology has a huge amount of hypocrisy - if we turn to religion, then all these "entertainment" games/competitions are not encouraged by the radicals. But nevertheless, Qatar wants to hold this tournament and wants to attract tourists. I am sure that tourists informally will behave very freely during the World Cup, although formal restrictions will allegedly take place.
I think need respect about culture in Qatar and not make the same with other countries allowed with alcoholic and some thing bad based on culture in Qatar. I don't sure this reason seem controversy and need to debate, based on religion in some countries we need respect and did which one allowed and left with some rule not allowed in Qatar. Simple I see what rule have applicated by Qatar government and I think this time World Cup begin more luxurious than held in other country before. I don't see reason about Qatar try to make difficult for tourist in this World Cup because they have make all easy if each other side understood about rule and culture there.