From a spa website.

Milk Table Shower Massage
A relaxing warm/soothing water and milk treatment. Hot milk running over your entire body. A soft and gentle exfoliation of your skin with a sea salt scrub, followed by your favorite type of massage. The ultimate treat for your tired achy body.

I always thought the milking table was a massage table that had a hole in it so the guy can lay on his stomach and stick his dick through the hole, and the masseuse gets under the table to relieve him.