Since you are headed to a Spa in an upscale area.... maybe you would be more comfortable in a sundress or summery skirt and top.
Seems you have the tipping suggestion covered.... and I concur... tip at the end of your experience, not as you go.
Lunch will be light. Large plates professionally arranged with lovely displays of food to make you forget that you are eating healthy. Keep a few bucks out before you tip for the drive through when you leave.
I too think you will spend your day in a robe. I would probably wear panties too.
And make sure you arrange a sitter that night.... so you can celebrate the replenished you with Hubby!!!





