>I am explicitly talking about partying and having fun in extra curricular activities with employees.

Yeah, and I am explicitly liking it to other unacceptable things, as it itself is.

Nobody should be forced to drunk, or party, as part of "extra curricular activities with employees", or seen as a spoil-sport for not doing so, much less even considering firing him.

To see how disturbing this can go, consider employee that was once an alcoholic and wants to fully abstain fun or not, or someone having traumatic experience by having an alcoholic in their family...

To be frank, your position is beyond the pale. It's only considered because of old-school disturbing manner of thining about what a company (or team within one) should be able to expect from someone working for them.