(Mostly) Stealth run of Nightclub in Payday 2. Two caveats: I use the Loot Drop Truck asset. Getting the bags out of the club solo is near impossible (if someone knows a way to do this without alerting the whole club, please let me know in comments). Also, the escape isn't stealthy, but the cops never arrive. It's possible to sneak out but it's really dependent on the positions of all of the civilians, and I didn't get lucky.
It's worth noting that sometimes, there'll be a whole bunch of armed guys (6 or so) in the manager's office. If this happens, it's (to my knowledge) not possible to have a silent run, as even if you manage to kill them all before they start shooting, the people on the balcony on the other side of the club will see it and freak out. All other guard configurations are possible (that I've seen) at least up until you make the cash drop.
Required skills (for this method): ECM Overdrive (Ace) - this can be circumvented by getting the keycard to the door, but that increases your chances of getting seen significantly, if you don't get very lucky.
Lockpicking Expert - To pick the safe. Also not technically required, as you can drill it and nobody will hear you.
Recommended Skills: Cleaner (Ace) - depending on the guard configuration, you may need to kill 2-3 people before reaching the office, and leaving their bodies in the kitchen area is a great way to get seen.