Girls should be ID'd before we make too many guesses.
Not sisters. Not even related. Look at their faces. Girl 2 appears between second 4 and 5.
Girls in back are a set of matching swimsuits. So are girls in front.
Not being the room in the pic doesn't mean it's not that hotel. Private suites often don't have photos taken of the interior circulating. To protect guests.
Turkish bathhouse, yes. Hex pattern on tile.
Half scrubbing threads.