B1/B2 visa appointment for parents and in-laws

Question to those who recently had b1/b2 visa interview in Mumbai or any other consulate…
Do you know if there would be multiple windows for the interview of it is just window?

Asking this because we have scheduled appointment for my parents and in-laws on the same day at the same time slot.
Would there be any issue if the same office takes interview for both parties?
Although me and my wife are sponsoring separately for our parents and their appointments are different. It just happens to be at the same time.

Thank you.