The Drawing Room is a regular London based drawing event with costumes & narratives instead of nudity. Anyone is welcome, people take turns posing, no-one 'teaches' - it's just a chance to draw weird things in a relaxed setting. Some people do use it to research poses for their work, but it's really about the fun of drawing (and dressing up) rather than being 'good'.
"You've made me draw again for the first time in 5 (6,7) years" (we get this a lot) "I've never drawn so much and laughed so much at the same time"