We all know about charms to keep Muggles out of places where witches and wizards gather, but what if a witch or wizard actually wants to bring a Muggle to one of these places? We already know Hermione brought her parents school shopping her second year. There must be those who want to bring their Muggle girlfriends or boyfriends to these places as well.
How would a Muggle get past all these charms? We saw in book two they do not need to be permanently attached to someone with magic for this to happen, and I doubt Hermione at the age of twelve did not know enough about magic to bypass such powerful charms.
Maybe some mundane object can be enchanted to allow Muggles to pass through these barriors. We already know objects can be enchanted to make Muggles miserable. What do all of you think.
Also, a random thought to attach to this thread as well: can Muggles see ghosts the way witches and wizards can?