I think there are two different interpretations of posh one of which has nothing to do with class. As Mellotron suggested you can be thought of as POSH for reading a book and in the right circumstances it can be taken as a complement.
I'm 47 and have never been to an opera. Having said that I once sat through Carmen on Sky Arts 2 on a dull Sunday afternoon and absolutely loved it. The inverted snob piece is probably holding me back here, because I swore as a youth, that no matter what else I did in my life, I was never ever...
Port Out Starboard Home - Surely being posh is all about wanting and affording "the best", where the best translates as lifting yourself up above others. 1901'ers are in the posh seats whether they consider themselves posh or not, because they are prepared to pay more than the rest of us to...