I'm happy with a Premier Inn tbh. For a treat (maybe twice a year at most) I'd spend up to £100, and that might be something with a spa or definitely with breakfast included.
I've just seen that a friend of mine spent £750 on a night's stay at a top rated hotel with a Michelin Starred restaurant.
I'm sure it was very nice, but £750!! I could go to New York for that price.
Obviously it'll depend on income and leftover money, but just curious to see.