I feel like Wyndham and Grand seem to do a decent job in doing this. The lower level brands are going to be hit or miss, but I've "hit" much more recently than not, granted I have had to ask more than not. My most recent stays were all upgraded, I was pre-assigned a King Studio Suite (couch and separate whirlpool tub) at a Baymont on a reservation for a basic king room and asked and received upgrades to a deluxe (meaning a foldout couch and another TV) room at a very nice new LaQuinta in Orlando and to an actual suite (with separate living area) at a LaQuinta in the Nashville area. It's a shame they don't allow you to self upgrade for free when checking in via app, that said, the app check in seems pretty worthless at this point - certainly nothing like Hilton's.