Hello. Both the domestic CO Presidents club and NW World club are land side in terminal 1. From UA check-in at terminal 3 they are a 5min. walk through the now deserted terminal 2. Not that far really. The Presidents club (by CO checkin) is pretty small but they have those yummy mini-muffins in the morning! I haven't been in the domestic NW world club but I recall someone saying recently that they had spent a bit of money on some re-furnishing.
Happy flying, tattikat2