Life Drawing is complex, and it can be as simple or as difficult as the drawer intends it to be. Many consider it to be the most challenging type of drawing. Certainly if you are attempting to capture an exact likeness of the model, but also imposing your own style, it takes years of practise, unless you are a budding Leonardo!
And a likeness of the model is the normal reason for attending Life Drawing, but it doesn’t have to be. You can just as easily be inspired by the model, and draw accordingly. Last week one of the attendees did exactly that. It may not be an exact likeness of Lauren, but if you were familiar with the model you can easily spot the inspiration. See image below. One of the reasons I enjoy running this class is the pure diversity of the work produced.