Individual is a single person needing their Headshot done.
A group looking to book a Headshot would be an agency or business looking to all have their Headshots taken
I always recommend light make up and bring all your makeup with you. Some basic tips, glossy lips look better than matte. Having a makeup artist come to the studio is also an option. If you need a referral, I can help you find someone.
You get to actively choose while in the studio and shooting. You can choose none of them, all of them or somewhere in between. Headshots are paid for the day of the shoot in the studio.