Started the night at a pub at level 3, Vovager, paid the entrance ticket and got a wristband. Night started slow, and there was plenty of time to grab some drinks and make new friends through jenga and other games. Shots were distributed at each pub, but that is unlikely to be enough. More likely than not, you will end up buying 1 or 2 beers at each pub (at around 500-700 yen each). As the night went on, got to know and interact with more and more people, and i probably say, about half are on holidays, while the other half are working in Japan.
Do be careful of the time if you are planning to catch the last train back. By the time, i started saying goodbye at midnight, I missed my train, and had to take a cab back to my hotel near Itami airport, which ended up costing more than the cost of my hotel stay!