I had the same task
i just called some GC friends for a date on the same time , started it and left em alone . That should do the trick to finish the task.
also did the same with a quest from my rival to go on 7dates on 3 days . All done in an hour …
Just wanted to add on doing big actions , there is one which takes 8 energy points and only gives you 5 little stars i think it is " throw a tanturm " there is also other actions with the same problem of not gaining enough stars or no star…
They should do a backup system of their own with all of their game savadata for each user
at least that will solve device problem when changing from ios to android prehaps
like electronic arts have origin
Buying a new apartment will increase the numbers of fans
also you can have your pets(they generate enrgey xp points every few hours )in them
depending on the apartment the type of pets allowed differs.
the one on the coast allows all types pf pets.