Attention massage therapists?

Attention massage therapists?
Keep it in the open. I've never seen massage promotions done behind "closed doors". The idea is to let everyone see how good it feels and to hear the comments from the massagees.
I am performing seated massage therapy at a fair this summer to promote my seated massage business. I have an ez-up with four sides.I am doing free 5 minute sessions.Should I do the massages with the sides closed for privacy,or keep it out in the open?Any advice from someone who has had this experience would be appreciated.
I am not allowed to charge.This is just for businesses to promote.

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