I think you've got the right idea
Having them there as an option is probably not a bad idea, especially if people are standing around looking a bit bored. I just had visions of the opposite extreme, whereby it's very easy to kill the atmosphere of the entire place by declaring that everybody is now going to play the Pin the Donkey on the Twister, Queensbury Rules Variant.

Edit: May derive from bad experience with a game that involved picking up a cardboard box with one's mouth. As one of the taller and less flexible people in the room, I was continually goaded to try by people who drew a perverse level of amusement from my inability to bend without overbalancing into an undignified faceplant.
(LongJohnBaldry, Tue 31 Aug 2010, 14:42, 1 reply, 16 years ago)

I found that on a party games list, only with a paper bag
my first thought was "eww that bag would get soggy pretty quickly"
( Kitty v1.0 desperately naive, Tue 31 Aug 2010, 15:05, Reply)

Well with this one you started with a cereal box
and once everyone had tried to pick it up, you cut a strip off the top, thus making it smaller with each iteration. I suppose you could do the same with a paper bag, although the cereal box is more structurally sound.
(LongJohnBaldry, Tue 31 Aug 2010, 15:08, Reply)