There are 14 Power to the People stations.
Power to the People #1 (Ryan Amusements)
As you head to get the ticket.
Power to the People #2 (Ryan Amusements)
After you go past the family display.
Power to the People #3 (Pauper's Drop)
After reaching Journal 39, go out the door and down the stairs.
Power to the People #4 (Pauper's Drop)
Behind the stage at the rear of skid row.
Power to the People #5 (Pauper's Drop)
After you enter the hotel, you go through a hole turn left and there is a blue sheet. On the right there is the station.
Power to the People #6 (Siren Alley)
In Mermaid Lounge, travel up the stairs, hack the door and drop down a hole in the floor.
Power to the People #7 (Siren Alley)
You can find this one just before pump station 5
Power to the People #8 (Dionysus Park)
Locked behind a door - Code is 1080
Power to the People #9 (Dionysus Park)
As you travel towards the train.
Power to the People #10 (Fontaine Futuristics)
You must destroy the flying bot then you can enter the lab.
Power to the People #11 (Fontaine Futuristics)
Turn on the lights and it's at the bottom of the cell area.
Power to the People #12 (Persephone Outer)
It's directly to your left.
Power to the People #13 (Inner Persephone)
When you locate Sinclair and gain access to him, turn around it will be behind you.
Power to the People #14 (Inner Persephone)
After you pass though Ward B there will be a rocket turret, it is in this room.
Please see linked site for exact locations
http://m.au.ign.com/wikis/bioshock-2/Power_to_the_People_Loc...