My impression that you don't particularly care about losing that client comes from your blog post discussing the matter. If you wanted to keep that customer, I wouldn't have written a defensive blog post about it. I would have had a private email exchange with that particular customer, and maybe offered them some freebies or a discount for their troubles.

Taking the time to single their comment out and write several paragraphs on why 'it's totally justified to blog about partying' and why 'partying and service problems are totally unconnected phenomena because we work our asses off' seems dismissive not understanding.

The bottom line is that the blog post doesn't do anything to resolve the commenter's complaints. It's really just a long excuse, and not likely to persuade someone who begins from the premise of being dissatisfied with the level of service already being provided.

So, my impression is that since you're providing an excuse rather than a solution, you ultimately are willing to say, "we're okay with losing a customer or two in order to continue blogging about our events where we drink with customers, we'll make up the loss by attracting more customers with the parties." That's a valid business decision to make. But there may be a low cost way of managing your public image such that you can continue to have customer development parties with drinking and also keep frustrated customers.