TheHappiestHour party Cancelled

The number one website for finding happy hours in Melbourne, TheHappiestHour, has had its official relaunch party cancelled. According to their blog post, "the venue owner received a letter from the powers that be today stating that by hosting the party, it could be in violation of some Responsible Drinking Laws". Is this a direct attack on Melbourne's number one happy hour website? Feel free to read all the speculation you can handle in the comments section of their blog.