Hey, it's alive! I wonder if that other izakaya, "Gen", would follow soon.
Not really gonna defend their choice of using "whatsontap", but in this case it works because of the context. That's just about how they could imply that the person saying it is a local, or someone from Japan.
Any Japanese knows that "toriaezu nama" is a phrase that would roughly mean "i'll have draft beer", and not a type of drink that one orders specifically. The locals just kept using the phrase thinking it meant as such, that it became a noun. The two recognized right away when the man used "toriaezu nama" in the right context, while it took the others a while until he mentioned "beer".
Sure enough, TL notes at the credits page confirms this.