I would love to see the sinclub being expanded by a few areas since i believe the addition of too many new places would strip off the at times already lowered popularity.
Maybe even adding an upper floor for dine and wine plus an elevator ( mirrored goes without saying ) for those who had the "pleasure" already followed by a "swinger club" area in farther dungeons of the sinclub and since my creative juices are flowing already, why not extend the night club's bathroom by a few functioning glory holes.
I would actually second the merging of both yacht and love island, possibly with the addition of an underwater section if that would suffice performance wise.
I'm an Aquarius after all and who wouldn't be intrigued to get a little naughty underwater ? Such a place is definitely part of my bucket list for sex at unusual places but shhhhh!