Simple solution: Let the market decide. Certain bars will find they get more business allowing families, and certain bars will find they lose business allowing in families. Single customers, and non-child couple, of different temperaments, will vote with their dollars. Eventually a new stable environment will exist, with some number of places that cater to families, some number that tolerate families, and some number that don't allow in minors. You don't need to complain online, just vote with your dollars.