Parents who telecommute. Parents who are entrepreneurs or freelancers. Parents who work multiple jobs or swing shifts or rotating shifts or part-time. Parents who are looking for work.
Parents who need time for health care appointments. Parents who've gone back to school. Parents who've just moved to town and don't yet have a support network. Parents who've had a crisis pop up and need somewhere safe to leave the kids for the next hour or two.
For these parents, child care can be twice the headache it is for parents who work regular business hours. So the concept of a drop-in child care center, where care is available by reservation or at the last minute, might seem a no-brainer.