The eagle eyed will note that my blue print differs from just about every other source in that I have a connecting corridor between the port and starboard entrances to the observation lounge.
I did this as we clearly see Riker and other crew/guests exit the lounge via the port side door and turn right. All other blue prints have a solid wall there and that made no sense to me. Especially as there was no obvious access to the equipment bay and computer access behind the bridge.
Also, unhappy that the only way to the observation lounge was a turbolift via the bridge or ramp access from deck 2, I’ve added a turbolift door on the port side corridor. Forcing guests via the bridge or ramps to access the primary conference room on board a ship as grand as the Galaxy class, I feel this to be the easiest fix!