A 300 baht entry fee including one drink, and you're in X-Zyte on third road, near Buffalo bar. X-Zyte is one of the disco's I would recommend in Pattaya (I like this one more than the Lucifers, Tony's or Marines to name just a few, but that is a personal opinion).
X-zyte has a more relaxed atmosphere, the interior is black, with giant screens and you can have a look at the nice little shows.
It is mainly Thai, and Thai music may get a little bit boring after a while, but the locals never get boring.
In fact, I would never go there (or in any other disco), but you can't always take your girlfriend to a gogobar, you know... ;-)
Click here for map