I visited Diane's new place today and this is my report as mentioned above. An actual review will be posted later, in Reviews.
So - my understanding is that Spa Casual on Sansom St. is still open, and still managed by the same old gentleman at the front desk as before.
The name of Diane's new place of employment is Body Relax, at 1122 South Street. Phone is 215-982-2375, and they prefer appointments made in advance. Two other women working there today - Ling Ling (not the young Ling Ling that used to work at Spa Casual and Grant Massage) and Sophia (not the Sophia from Ya Mei and Thai Beauty Spa). Place was clean and the ladies friendly.