In the above picture an astronaut is standing on a PLSS. The other PLSS is behind him standing in the PLSS recharge station. The place to store this PLSS was really on the floor between the two astronauts.
Since the gravity was low or nil the designers choose to exclude any seats in the cabin. Instead some restraints were used as shown in the above picture.
The cabin was pressurized and the astronauts could use it without space suits. Here are some pictures about astronauts in Apollo 17 LM:
Apollo 17 commander Eugene Cernan
Apollo 17 LM pilot Harrison Schmitt
The cabin was not a place for a person with claustrophobia.
Apollo 17 Lunar Module LM
A video about Apollo 11 LM and a ½ hour video about Apollo 14.
Video: "Apollo 11: Buzz Aldrin checks the lunar module"
Video: "Apollo 14: Mission to Fra Mauro 1971 NASA 3rd Moon Landing Alan Shepard"
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