Bro, these girls are responding to you. I'm not sure if you are hoping for "Yes daddy, I can't wait for our date. So happy you went to the gym", but you will rearely get that level of investment without being/building insane amounts of attraction

To the first girls, I would respond with. "Stop it! You're turning me on"
And to the second, I would respond with "Of course. Did you never get the invitation?"