Not strange at all.
At my former Kingdom Hall in Chicago (which housed 3 English congregations), we had two chairs set up by the entryway as well.
Those chairs could be used by "door attendants" who "greet and seat" people as they file in for a meeting.
Depending on your Hall's electronics system, those could be seating for microphone handlers, as they could be used by mic carriers during a meeting so they could sit in the back in between paragraphs (we had some older MS in our congregation, all the young people were DF or gone).
Or it could be used by someone who is partially handicapped but not confined to a wheelchair, who struggles to make it to the Kingdom Hall but is provided convenient seating close by the entryway/exit so that they may see everyone as they come and go, and not contend with sitting in the cramped rows, etc.
All of the above were reasons we had 2 chairs by our entryway at the Kingdom Hall I attended when a Dub.
(Wow, I realized I did not bash the Dubs in this post, but answered a question that reminded me of memories while still a JW lol.)