The author is happy to host others at her pool, but she says always asks them to bring snacks to share. Catherine Falls Commercial/Getty Images Owning a pool can be quite expensive, but I'm glad we can host our friends. I've realized that the pool is the draw; I don't need to handle everything for our guests. When friends come for a swim, I ask them to bring a snack to share. It keeps costs down for me. Seven years ago, we finally made our family's dream of having a pool in our backyard come t