I just started a little Co-op for my mom's peers, Mornings with Dorathea. I have invited her friends from church who have dependent spouses to leave him or her at our house for the morning and get their teeth cleaned or their hair cut without their beloved escort. I have given them 9am-2pm and a choice of $5 an hour or banking caring time for another day when I need help. The idea has been well received.
I figure like when my kids are little, if I am stuck I might as well help someone out. They have to be able to walk up my driveway (a little steep) and promise not to dirty my sofa (ie- diapers, if needed)