I don't really like it, especially in the evening or at tea time.
It's ok to have one visitor per week, one that lasts for an hour at most and that's it.
I have a friend who I know is going to come over with her DC tonight. She hasn't said she will so I can't tell her I'm busy or whatever but she'll turn up & expect to come in & have the DC play for hours.
I CBA. I have a cold & I'm tired & I don't want to have to tidy ALL THE TOYS in the house away before an evening of bed time, washing, cleaning and bed.