I think of family friendly as:
lets you sometimes meet the needs of your children, aging parents, partner/spouse. I think that if work places get so busy accomodating their employees, then sometimes the main work doesn't get done. I think it means when you call in sick because of a sick child or yourself, they don't act like you have an illegitimate excuse. A flexible work place allows trades to meet family needs, allows a nurse (if her co-workers, represented by the charge nurse, are in agreement and the unit isn't in "shambles") to take a very occasional 2 hours [part of which is their lunch hour] away to do a volunteer job at her child's school or go see a program, understands that my family may need to come first at times. Family friendly work places treat employees like adults and because the adults are adults they engage in reciprocity, meaning the employee is willing to go the extra mile for the employer, too. Nurses who get consideration from their employer should be willing to give consideration, that is covering for other nurses who have family related needs (like an elderly parent need, going to a doctor appt with a spouse), working the dreaded extra shift (we are not talking about MOT, I'm talking gentleman's agreement here).
I think family friendly environments are not so much a matter of policy as mindset, where the employer and management and the employee view each other with respect ("I couldn't do this job without YOU") and they allow some humanity in the work place. This environment is spoiled by viewing the employee or their work output as a commodity, taking more than giving (OVER A PERIOD OF TIME) and general abuse of the individuals (one person ALWAYS gets the benefits and one or more person ALWAYS bears the burden).
I think single, married, people in SO relationships, people with elderly parents etc should benefit from a family friendly environment. For example NO policy covers letting a man or woman accompany a significant other of the same or opposite sex to a doc's appointment, but a family friendly environment would (through trades or other forms of reciprocity). We all belong to some some type of extended family structure.