Hard Mode with all objectives is doable, but the timings are pretty tight. Not worth the effort.
Running in a diagonal line (hold w and a or d at the same time) gives a gisnificant speed boost.
My recommendation is to pick up the wine and condoms in the office right at the start.
Then fill all the girls meters and do the following steps, while quickly filling the girl meters in between:
1: condoms (its the hardest task with the tightest timing, so quickly reset or hide if it won't work out)
2: far half of the toilets (cleaning all the cabins at once is very unsafe)
3: near half of the toilets (pick up lefts if hes in there)
4: bottles
5: place Lefty
6. pick up the damn phone
So far I have seen Lefty spawn in the kitchen (on the counter) and the male toilets (on one of the sinks) only.
If he spawns in the kitchen, just pick him up and place him after you are done with the other tasks.
Make sure to complete the tasks before Fredina goes nuclear.
Late night before the phone call, a ghost appears in her chamber and speeds up the music box.
It will become too fast to do any tasks, except for the phone.
You might be able to place Lefty if you picked him up earlier even when Fredina goes apeshit, but it's risky.
Anything goes wrong, there are a lot of hiding places that work.
Air vents are a great place to hide. Keep the rat pope some company and contemplate what you are doing.
Hiding in the locker of the staff room (party locker) works well too.
There is probably a lot more places you can hide in. As long as you don't get found you will get a lot of money just for surviving.
where is the condom machine?
Next to the bar is a room with a stage. The condom machine is in there.