BioShock/Power to the People

Neptune's Bounty
Once you defeat Peach Wilkins and retrieve your weapons, go down the stairs and you'll walk right into the station.

Arcadia
Once you go into the farmers market you'll go in Tree Farm - Right below the big Farmers Market sign above the small set of stairs you'll find the station to the left of the sign.

Fort Frolic
While on the first floor head towards the southern mall. You will see a vending machine in this area. head towards the store Le Marquios D'epoque. As soon as you enter turn right and go downstairs, take a left and you'll see the station in the hallway.

To get the next one go to Poseidon Plaza. Pass through the ice area, turn right and head to Sinclair Spirits. To open the door in Sinclair Spirits hit the switch behind the bar, next to the cash register. Go to the door behind the water, go downstairs and turn left for the station.

Hephaestus
There's a Gatherers Garden next to Heat Loss Monitoring. The station is in front of that Gatherers Garden

Go down to The Workshops. There's a door guarded by two turrets. Work your way to the back of the office and turn left. There's the station.