Ugh...this is me and I hate it. I really think it's the stage of life we're in with three teens, but we are pretty social in general. We have a friend who just asked our family over for dinner and the first weekend evening we have free (any Fri., Sat. or Sun.) is Labor Day
, (granted two of the weekends we are out of town, not just busy). I asked if we could do a weeknight and she said her family doesn't have a weeknight where they are all home....so I just dropped it and feel sad.
In answer to your question though, if it's just a girlfriend we can usually squeeze time in during the week. If it's couples, we can usually still find a weeknight evening. Our problem is usually when it involves our children.