As a general comment, I'm not sure what miles or western hotel rooms have to do with chattiness, but I think you are projecting a hypothesis on the basis of selected anecdotes. I don't believe that the incidence of striking up a conversation is any lower in business class over economy (barring the obvious physical limitations of many modern 'suites'), or in the lounge over the gate.

Personally, I don't want to talk to people, because chances are pretty high that I don't want to hear about their job as a vacuum cleaner salesman, their last fishing vacation, or their grandkids. If anything, I'm much more likely to speak to someone in a lounge or business class if I overhear that there is a possibility of professional overlap, than I am at the gate.

I recall many years ago a flight to Florida where I sat next to a Tammy Faye Baker lookalike real estate agent from Ft Lauderdale who couldn't shut up the entire flight about her 'dream listings' and how I should invest money with her. I actually fell asleep with my headphones on and she was still talking when I woke up 30 minutes later.