Recreation deck
From Memory Alpha, the free Star Trek reference.
A recreation deck was a location on Federation starships where crewmembers could go to relax when off duty. The area included a number of games and other recreational activities.
The refitted USS Enterprise had a recreation deck. Overseeing the area was a display showing the legacy of ships named Enterprise.
In 2272, Will Decker showed a probe of Ilia to the display and games on the recreation deck in an attempt to revive the real Ilia's memories and emotions so as to learn about the intentions of V'Ger. The attempt failed, with the Ilia probe stating that the game which the real Ilia had enjoyed served no purpose. While Decker and the probe were still on the recreation deck, the probe revealed V'Ger's plans to eradicate the Enterprise crew, after which Decker suggested resurfacing the true Ilia's memories so V'Ger could gain a better understanding of Humans. The Ilia probe found this logical and permitted the process. (Star Trek: The Motion Picture)
