Nope, no clothes, although you could wear your panties if you want.
You get there and are led to the ladies lounge, handed a robe and slippers. You need to take off your shirt and bra, like I said leave on the panties if you are more comfy taht way. Take off shoes and socks, and any jewelry you're wearing. I loop my rings through the curly bracelet the locker key is on, put my awtch around it, and don't wear any other jewelry to the spa. During treatments I either leave it in the robe pocket (not suggested if you are getting amanicure!) or on the hook on the back of the door with the robe over it.
Your therapist will come and get you and lead you to the treatment room. She'll ask you to take off the robe and get on the table face up and pull the sheet and blanket up over you. Then she'll step out of the room and give you a little time to get set. She'll knock before coming back in.
The room is dimly lit. She'll remove any makeup you are wearing, and then examine your face and discuss your current skin care regimen and any concerns you have. What happens next depends on the type of facial you're getting, but basically they use a variety of products on you, zap blackheads, use steam on your face, etc. During the application of one product, or while waiting for a masque to dry, you'll receive a neck, shoulder, upper chest (they don't touch any "private" areas, just the area above your cleavage up to your neck) and arm massage. Most of the time you'll also get a foot massage.
When she's all done, she'll step out of the room while you slip back into the robe. If you really don't want to take off your bra, you could leave it on and just slip the straps down under your arms I guess. If you are very modest, don't be afraid to say so.
A facial is an incredible experience that you'll want to make a regular part of your skin care routine
Anne