1) Nocturnal doorman 
A night porter is a porter who is on duty during the night. A hotel commonly has a night porter to attend to the needs of guests and other incidents during the night. They may also be required to perform sundry maintenance and cleaning tasks such as polishing boots, emptying spittoons and laying fires. `examples there are as many interpretations ....
[n] - a porter on duty during the night
noun a porter on duty during the night