True that not all providers offer it.
Think I'll stick to indies all the same when and if I branch out. Even though they too may have more than one client in a row, I'm just more comfortable with what I've experienced so far. But....
Aside from certain SP who charge low and choose to see several clients in a row like a few LL and EI girls (and I know this because I've had friends who did it for various reasons), most indies from what I've noticed rarely see more than 2 or 3 clients a day, and we have plenty of time to shower in between. Most of the time I just have one client in a day, sometimes 2, rarely 3.

I always take a shower before and after seeing a client to refresh myself.
All I can say is you can't expect GFE services at MP's.. I know there's one or two places where it's offered but that's far from being the norm based on what I've been told. That's even why some providers choose to work at parlours. They don't want to offer GFE. Just be prepared to pay extra or have this service refused to you. Even if a client tells you he received xyz service at an establishment like this, it's very YMMV in my experience.