Typically, she does lots of intervals during her rides. Hills, sprints, etc. Last night, though, she wanted us to JUST endure! Try to maintain cadence of about 100rpm, and an 8/10 effort. She has great music choices, and she, herself was spinning at a much lower intensity so she could talk to us. She is definitely able to motivate. She does cadence checks periodically, will run through some visualizations with us (in between songs is going around a turn, for example). She had us do a couple of pickups towards the end and talked us through it by saying, "Ok, you're picking someone out from the crowd in front of you, and you are going to be passing them". That sort of thing. It's the thing I don't have at my home trainer and the reason I love going to class!
The consequence of all that is that I am tired with a capital 'T' today! I'm supposed to run 4.5 miles, but may decide to take a rest day instead! Or do less miles. We'll see how I feel a little later!
Do your bikes show the gearing, or is it just a knob you turn? The spin bikes at our Y show the gear (1-20), so the instructor will give us a gear and a cadence to hold. I can't imagine running 100rpm for 35 minutes in anything but the easier gears! You rock!