An entry is the provision of a free night's lodging to participants of an event or just to good people. The word "inscription" comes from the verb "fit", that is, "add to the list of invitees." Although in fact no list is compulsory, and often everything is limited to an oral invitation.
Usually the note is accompanied by a so-called "unrestrained fun" , for which in the morning it is a bit embarrassing.
The Internet has breathed new life into the culture of the lists, because it is much easier to find an entry in an unfamiliar city on a social network.
The list is in the list: Slang