On the ground at MEX there was an engine problem and the power to run the stranded plane came from the airport supply. As a result the cabins were roasting hot as they could not draw enough amps to run the air conditioning fully. The pilot apologise and said as soon as the engines could be started they could run the air conditioning properly.
In F it remained blissfully cool as equally cool bubbles were enjoyed. I guess warm Diet Coke back in lowers classes tasted fine and cooled sweaty bodies!