In Cheers, Sam is a recovering alcoholic who doesn't drink. From the first episode onward, does Sam ever drink? For the purpose of this question, I will include answers where he's seen drinking on-screen (obviously), but also other characters referring to Sam's drinking where the drinking occurred during or after the first episode of Cheers. So the period during which he played baseball drunk don't count.
Answers may refer to any episode of Cheers or Frasier (as they're set in the same universe and Sam appears on Frasier at least one time).
I'm asking because Sam is (an integral part of) Cheers (the series) and getting to know Sam is vital to understanding much of his interactions with other people in the series.