Holding a house party in the Regency Era was no small affair. Nowadays, we invite people over for an evening or maybe a weekend, but back then it was a much more elaborate affair. (I usually pick up some wine, beer, Diet Coke and order a pizza myself.)
Guests traveled from the city to the estate of their hosts accompanied by their valets, nannies, ladies maids, their clothing, carriages, horses and the expectation that they were going to be staying there for a while. It may have been a week or two or six. All the guests and their entourage must be given rooms or places to sleep and meals. They must also be kept entertained. (I like to put in a DVD or turn on a football game. Or go out and let someone else cook and clean.)
Keeping a houseful of guests amused for an extended period of time long before television was quite the undertaking. (Can you imagine??) There were horses for hunting and riding, equipment for archery and badminton, rooms for ladies to work on watercolors and needlework, pianofortes and other instruments on hand for showing off their musical prowess (It has already been established I am not the musical one in the family.) They took walks around the grounds and spent a great deal of time at the overloaded dinner tables in the evenings. (My yard would only allow them short little laps, not very fun at all.)
Can you imagine hosting so many people for weeks at your home?