A universal white room disposed at the distal end of an access arm of a launch pad service tower utilizes multiple interchangeable modular rooms of varying shapes, sizes and configurations to interface with access points on multiple differently configured launch vehicles and/or payload(s). The interchangeable modular rooms attach to a common portal in the white room allowing a single white room to be used. The modular rooms may be stationary relative to the white room or movable relative to the white room.