Ashtanga practitioners have more options than you might think:
Washington Post Express Never Out Of Practice: Mysore yoga classes help students advance at just the right pace – “First-timers get personal training in a few postures, starting with five rounds of sun salutations, and that may be all they do. As they return to class and master that section, the instructor adds on. Advanced students can complete the beginning of the series, but at some point, even people who can hook their legs around their necks need an assist, a modification or a pep talk.”
A few months ago, I pointed to another article about Ashtanga and Mysore practice in the DC area.
Thanks to Donavan Wilson for tipping me off about this article since I am “out of pocket” (meaning “away,” it’s journalism jargon, if I remember correctly.)