You would feel totally out of place if you go to a casual gathering of old friends dressed in expensive suit and tie, unless you want to appear snobbish and showy.
More picturesque diseases, even when they are dangerous, and less dangerous diseases, particularly when they are the diseases of the rich, can be and very frequently are a source of snobbish self-importance.
'I don't know that it exactly amuses me to be taken in to dinner by the agent of the P. and O., ' she said, laughing in order that what she said might not seem snobbish.