A Slickroom is basically a VR room. Its full of pods with immersive VR programs, usually connected to a common server (yeah, skilled characters could try to hack the station's computer system from here).
Slickrooms and Slicksoft were introduced and detailed in A Pound of Flesh. To add more slick-fun I recommend TKG's "Hideo's World", about a glitchy VR world with a nasty surprise.