My Yang- in Yoga classes are most suited to advanced beginners and improvers. This is an evening class and so it starts strong (yang) and finishes very slow, stretchy and meditative (yin). Expect to move relatively quickly, but steadily and with no sense of rushing, through a flow of poses for the first full half hour of the class.
The second half of the class moves into deep, long held floor-based poses (yin poses) which work at deeply affecting the more intransigent tissues of the body and soothing the mind. There is then plenty of time for a pre-bed savasana and often a meditation too. And all in one hour!