hardly ever. We did have one friend stopping by nearly every day due to lack of supervision but she has since moved to a more reliable after school care. Not many come by since we have a cat and do not want allergies of people to make them sick.
Once or twice a week. We are too busy with other extracurriculars and homework to have more than that. Everything has to be so scheduled nowadays with the parents so impromptu get-togethers don't happen easily as when I was a kid.
They play with their friends pretty much everyday, sometimes they come here, other times they go to their friend houses, sometimes they just play around our block. They play outside in the snow pretty much as they play outside in the summer.