@B.B.:
Your pyramid-ulating technique first scores you the RFID tags to 3 sofa's and their exact location. It's amazing that these tags are broadcasting in mutual signal range but it must be part of a clearance sale...you check and sure enough, the streaming text
<<Slashing prices! Everything has got to go at Amazing Lar'ari's Furniture Outlet! overstock sales in this furniture clearance section is final. There are no refunds or exchanges. >> wraps around the cartoon icon of the head of a bald ork who's winking and giving a thumbs up. Exactly what you were hoping for as you look for modulations in the spectral decomposition of the spam signal which can point to trace signatures of nearby nodes. Sure enough your Scan program is able to reconstruct the layout of the different nodes inside the basement and you shoot it over on team shush.

The pipe to your Browse program turns up the names of both of the card players. They are Akira and Shigeo of the Kanaga-gumi's, two low level thugs with a series of weapon violations that you can't get the specifics on without hacking KE records, but their mugshots did get out on the VPN's.
You also already knew from the beginning where the physical location of the main node you're presently in is and you throw that up on the map as well. Other than these nodes you find no others in the basement.
[OOC: Akira is Y1, Shigeo is Y2.]@Cynthia:
You have made your way down and behind the stair case and are crouched with your back to the wall right next to the basement door. It looks like just a standard mechanical bolt lock of comparatively standard complexity but from looking in the crack of the door you see the bolt is not in and the door is most likely unlocked.