your warning bells were clanging for a reason....you can recognize it, you know what you have seen.
If you want to try again you might be wrong, but 3 drinks in 1.5 hours at LUNCH? and a first lunch whe,re you don't know each other?
do you really want to take on this extra burden? I myself, do not have the desire to keep picking up the strays, they take too much energy I should put into myself.