First time tomorrow! Etiquette Questions

Hey guys I'm finally going to my first Spa visit tomorrow headed to Pure, just had a few questions on what I need to do once I get there and the best course of action.

So from my understanding I get there, pay the door fee, and I'm escorted to a room where I shower then wait for the MPA to enter (correct me if I'm wrong pls.)

Here are my questions:

What should I wear to the spa? Are Jeans and a TShirt or Crewneck sweater fine? or do I have to dress up a a little to look good?
When...

First time tomorrow! Etiquette Questions