I would feel uncomfortable doing speed dating. It sounds unnatural and forced. I would be guarded and would only make small talk during that 4 mins. I don't believe in dating anyway. You meet someone and then get to know them. If there's chemistry etc and it's meant to happen between you both then it will be.
Lee: Hey booty we have met before
Booty: Yes I dont like to talk about that
Lee: Well you dont want me to talk about chic and how they screwed me from the O do you, we already discussed that 500x
Booty: Quite, do you like my mascara
Lee: Yes but its not the best color on you
Booty: Lee, mascara only comes in black
Lee: Yes, but I thought a certain brown looked great on you
Booty: Erh, what?
Lee: Can we go into the disabled toilet to scat?
Booty: Im leaving right now
Lee: Can I come?
Booty: In your dreams
Lee: In my memories actually