There is nothing wrong with going out with a man that has a child, but I would pay close attention to any man that has clocked up several children by several different women. He disappears for periods of time with little or no explanation. At dinner, he turns his phone over and puts in on silent.
These are all signs that they may be living a second life cheating, affair, etc. He may be very charming, enthusiastic and say what you want to hear. He disappears as soon as he arrives.