In a Chinese shop a HE means hand finish/hand relief. If your looking at a BJ that won't count as a HE in a Chinese girl's definition. CCS, to be exact, appeared as an acronym many years ago and is backside play, but really is the swiping of the hands/fingers up and down your crack, just like the old credit card machines - nothing to do with playing with the bollocks - and it's when you're face down (think about it).
There are quite a few more girls there than you think - you probably have another 4 to try, OP. The older lady is the owner and she'll only massage if the girls are all busy and then only if she likes you or can be bothered. The girls are there to earn their money, per customer, not per shift so she won't do them out of work. Have you chatted to her by the way? Got friendly? Asked her if she'll massage you? Know her name, even?