Sorry, no advice from me here, because I didn’t “shidduch date.”
The first time I met my father-in-law was when he was sitting shiva for his father. Eeees and I had been dating for about a month in a half when her grandfather passed away. At that point, the only member of her family whom I had met was her younger sister (and that was only because she was there the day we met). So, I went to be menachem avel. It was a pleasant meeting (at least as pleasant as nichum aveilim gets). Apparently I impressed her parents that day.
The Wolf