The cabinet will open with three more coins! (Shout out to Randomiser for the solution!!)
One more is to the left of the bar behind another bottle.One more coin is just sitting on the floor.Once the hologuide is activated if you move a bottle on the top left shelf it will highlight a secret spot on the wall with a round face click it for two more coins!.
Two are in a secret compartment that opens if you put a mug on the counter.(available later in the game when you take control of them) The first 4 coins are right next to each other
(+2 coins unconfirmed if you can get with ? in the last chapter or only with Rust)