There are loads of useless secret teleporters in this level. I assume they were made for a laugh (fire a rocket into one and then watch your backside).
Secret Places (7)
The "Exotica Tonight" poster in the main lobby can be opened. You literally have to "push her button" if you catch my drift.
Press on the bloody menu to open it.
Blow up the crack in the last dining room to find another secret.
This is the switch near the cash register. When you press it, the door to the left will open. But what you don't see is a secret door opening in the wall to the right of the switch. Jump into the wall to access a secret area behind it. Once you have an idea of where this secret exits, you can access it from the opposite end without hitting the switch. Also note that there is a DukeMatch-only switch hidden in here that activates a ceiling crusher in the first dining room.
This bloody handprint can be found in the sushi bar. Press it to open a secret place containing a freezethrower.
This cupboard is directly across from the bloody handprint in the previous secret. Do what the message says and the cupboard will extend backwards revealing a secret place.
Open the wine rack to find the last secret place.
Unofficial Secret Places
Push the cash register by the blue access card to open eight superfluous teleporters.
Jump into the "Exotica Tonight" poster (in the karaoke bar) to find yet another teleporter.
"Push her button": In the dark corner across from the blue mannequin of a woman (nightvision goggles required). This is referring to the "Exotica Tonight" poster from the first secret place.
"Push me": In a floor cupboard by the sushi bar (nightvision goggles required). The location is described in the secret place listing above.
"No one should be here - Levelord": On a wall in the Bank Roll area at the end (requires