In my experience, beds in Pakistan and I assume much of desi culture can be considered a perfectly acceptable place for even newcomer, previously stranger guests to sit and socialize. In Pakistan and even in America, social gatherings can include people wandering into and socializing in bedrooms while sitting on beds. I think it has to do with the limit on space/multipurpose use of furniture thing we discussed before when talking about dining room tables, and as a result it is tied largely to wealth/class and whether someone has enough social spaces in their home without resorting to using bedrooms. In M's family and the vast majority of desi social gatherings I've been to, it's just a norm; a bed is nothing more than a place to sit during the day.
That's not true in my perception of American culture. I would never show a guest to my bedroom except on a house tour given to only close friends or family. Guests would never dream of entering a bedroom in an American house unless specifically directed to. Beds are considered very personal places, and I can't imagine anyone even sitting on my bed except me and my husband. Even when my own parents visit they wouldn't sit on our bed unless I told them they would be sleeping in that room, and then it would be clear that the linens had been changed and they could consider it their bed during the duration of their stay (and then I would not sit on "their" bed, probably.)
Just a cultural difference. Sitting on the bed at a Pakistani dinner party = usually not weird. Even today most social functions I attend in Pakistan and with our more diverse social group of South Asians - in all but large homes - dinner parties include bedrooms as spillover party rooms.