From my understanding a beer parlour is a specific area where you will find people taking beer alone. No other drinks are served at this place. It is specifically meant for beer lovers only. But a pub is an entertainment arena or joint as we call it back home. It's a place where entertainment of different kinds is offeted under one roof. You will get music being played, there is a dance floor where people can get up and dance, there is the area that's called the bar area where they have some high chairs or stools, there they will serve you with wines or hard stuff like tecquila and whisky's. Then there is also a place set aside for those who would want to have some privacy they have couches for that in cubicles. That's quite something so if you are out to have some fun the whole night i guess a pub will work out for you.