Went to BIL's for Boxing Day and the house was freezing. They asked if we were warm enough, DH said he was a bit cold so they said they'd put the heating on low. We had our lunch in conservatory and in afternoon we noticed that we could see everyone's breath in the lounge. I then spotted a temperature gauge, 14c. AIBU, but this was far too cold for guests? Have to admit we tend to have temperature around 19c when we have guests.
I don't think it's got anything to do with money. We invited them here but BIL's wife loves entertaining and insisted we go to them. Food was lovely two choices, veggies, salad, bread and two pudds to choose from (better than what I'd have offered in all fairness), so it's not as if they'd invited us under pressure.