Why is that unethical? I don't drink, and I would happily give my share away. Rather than having to endure their stupid nagging for the impossible over and over and over again, like "come on, why don't you drink?" and "now come on, this is the day you'll start drinking" and "just one beer, let's try it", etc.
if the only reason is to get the booze... I could see that.
on the other hand... I generally don't drink, too, and like... You'd almost have to go out of your way for me to not share it. Or just be a lousy drunk.
Drink tickets should also cover non-alcoholic drinks for those who don't drink alcohol. Otherwise it discriminates against non-drinkers and could be indirect discrimination against, say, Muslims.
Their example is about religious discrimination not racism. Also, people like Muslims don't abstain from things like pork, alcohol etc because they don't like it, they're just not allowed to consume those things by their religion. Muslims can consume pork in emergency food shortages and stuff like that afaik, so I'd imagine you could probably find Muslims that have tried and actually like these things despite not being allowed to consume them.