Last year Megan and her bf and Belle her bf had some sexual fun in B5, a little bit of bondage were the lads lightly whipped the girls backsides. A bit of sexual fun was had but they didn't accually swap partners for intercourse. It was fun to watch. B5 is the place for such actives, not B4.
They also had BJ swap and more (not intercourse) in B4. IMO B4 is the ideal place for that kind of activities. especially in summer time when they can enjoy the outdoor area and the pool too. B5 has the worst camera setting of all the Barca places.