Presumably made back when Minehut had 15 lobbies, Lobby16 was, well, a Minehut remake. It never (in my books) got very popular as the main competitor/similar server, ValkNet, did.
I first found out about it whilst looking at clubs and seeing the Lobby16 club. I forgot about it until a few weeks later when the owner was advertising for it. It was pretty cool, and if you boot up the server nowadays it's the exact same as before.
The server IP is Lobby16.minehut.gg.