Is there a term used by directors to describe a brief interstitial scene identifying a location of a following scene? The interstitial doesn't need to show a sign pointing to the location, but it often will. As an example I think of the "RESTAURANT" interstitials in Seinfeld right before the cut to the dialogue.
Arguably this is a form of an establishing shot:
An establishing shot in filmmaking and television production sets up, or establishes, the context for a scene by showing the relationship between its important figures and objects. It is generally a long or extreme-long shot at the beginning of a scene indicating where, and sometimes when, the remainder of the scene takes place.