Your welcome.
No, I don't think it matters since they can hang out and get drinks on their own. I didn't plan to have the cocktail hour until I was put in the 2nd dinner seating since the first seating was already booked. My wedding is at 4pm and we won't have the reception dinner until 9pm. Yes, 9pm so I decided to do the cocktail hour. I am still deciding if I want to do my cake cutting during the cocktail since dinner will be so late. I didn't want to rent the conference room for a private reception. I am considering an option off site but it really depends on the number of guest I end up with.