Acceptable to shower someone else

My husband and I recently went to King spa nj in Palisades Park. While there we noticed guests over by the sit down shower area giving each other a shower/bath. It wasn't sexual in any way but I was surprised to see it. Is giving/getting a bath between guests allowed/not frowned upon? The staff didn't say anything but still want to get the opinion of others.

EDIT: Thanks for the quick answers.