Right wing dinner parties - I admit I've never been to one.
Funny because I've been to many dinner parties with right and left leaning, you seem a little niave with the following as the rest of your points can be fairly squared at some of the most ardent labour supporters...
Does everyone talk about how much money they have?
Usually by mentioning how much their house price has increased , and anecdotally university vc's discussing the dismal pay rise.
How many holidays homes they own?
Do you mean those on the left that have small 'villas' in France/et al or the small cottage they own in Cornwall or maybe their 'small' btl pension fund whilst expecting the state to pick up the tab as long as though they don't suffer personally? Or are you naively trying to suggest that all those holiday home owners are conservative voters?
How much better they are then everyone else?
I think you have ironically shot yourself in the foot with this, considering your last line.
I am slightly intrigued now, not enough to go to one though.