Well even though I don't think it will ever happen, since I think Gym will be the last thing (but please Nurse side Job), I would saynow, being realistic, aside from Gym and (possible) Nurse jobs, what else can be implemented?, im thinking about a chef job and a farmer job in lvl 4, chef job can be kinda similar to recepcionist job where if karryn fucks up the food or miss serve it she gets fucked in the middle of everyone.
for the farm at the 4th floor they can implement some funny stuff like she has to protect sheeps from werewolfs by doing X or Y or fucking them, or she has to do scarecrow job but then she gets man handled while doing it
2nd Floor Teacher Side Job for obvious reasons (Clerk Side Job also could be a thing)
3rd Floor Maid Side Job cleaning prisoner cells (also on the 3rd Floor you can expand with new rooms, since there are entrances not used. So Nun would not be that far off actually)
4th Floor I could see something done with the swimming pool
But yeah after Gym I hope that at least they do something with a Nurse Job before moving on.