RE:Door Knob SignI used to travel for work quite often! That would have been a fun door sign to travel with!
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RE:Door Knob SignI think you might get lots of trouble coming through the door. I have stayed in a couple of hotels in the past where guests would leave their room door ajar to let people know that visitors were welcome lol
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RE:Door Knob SignI love this idea. Wonder, if anybody ever tried something like this
Also, I like the idea to have an app where one could check in to inform others.
And you wouldnt need to search all the doors for the knob sign
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