Can a group start its treatments at the same time?
Not necessarily. Confirm room and attendant capacity, start times and the final guest count before organising the rest of your day.

Related questions
Can I add another guest to my reservation?
Contact the venue before bringing them. An extra guest may change room capacity, start times and the total price, so wait for confirmation.
How do I choose a date and time for my hamam?
Select your preferred date in the form and tell the team your preferred time when contacted. Wait for the agreed slot before making fixed plans around it.
Can friends choose different hamam packages?
Ask whether different treatments can start together and finish at different times. Agree where to meet afterward if one person has a longer massage.