This happens when you are sitting at the bar with a waitress or bartender that likes you. They'll say "So I'm dropping my kids off with their dad and I have nothing to do all weekend but lay by the pool..... nosirree.... nooooothing todo. So what are your plans?" They often do it in a subtle enough way that you might miss it. They are masters at tactful flirting, having learned by counterexample what not to do by orbiters.
Try this line in that situation: "We should get together".