Playdates and friendships

How often are you having playdates? How often do you get asked to playdates and birthday parties.. things like that? My kids used to have a regular group of mixed-aged friends we saw everyday at the playground. I went back to work and now we can't go to the playground everyday after-school. We almost never get asked go any playdates. My daughter is very social and outgoing.. if we happen to run into a kid from school, they are excited and play together. However, we never get invited by other families for playdates. I run into the same issue with my older child. I'm in a HCOL area and I wonder if everyone is just so busy working that they don't reach out? Then, I feel weird like I'm bothering people if I ask people to meet up. I want my kids to have best friends and nice groups of friends like I did as a kid.. so yea..how often are your kids seeing friends? What have you done to have more friendships outside of school?