Westminster Wedding

Jeremy Collier says, in one of his *Essays* (Part iii. Essay viii.): "As for the business of friendship you mentioned, 'tis not to be had at a *Westminster Wedding*." Being much interested in weddings in Westminster at the present day, I should be much obliged to any of your readers who can throw any light on the observation of the Essayist, as above cited. What other authors use the term?