Yes, I have and do "date" married women where the chemistry as well as the attraction is prevalent. I'm not out on a date per se but a one time rendezvous to meet over an iced tea.
I the event there is a mutual attraction and in addition there is always a discussion as well as an understanding upfront that I have no desire for anything other then to provide total discreet sexual fulfillment.
Most often it has been a very discreet covert situation where predominately is all about providing them satisfaction. Being one that enjoys the single life married women are perfect.