Plans and elevations are available here, both as pdf and as CAD (DWG) files – only currently available for NGS (West):
Gallery plan with shop front and internal elevations (pdf, to scale)
Gallery side elevation(pdf, to scale)
Gallery plan (CAD)
The legal maximum capacity of the NGS (West) space is 50 persons (if only the front area is available for a standing audience, the maximum capacity is 30 persons.)