Refreshments, prizes and plenty of alcohol go around making up an entertaining package.
Students who are called art monkeys come from all backgrounds and often have no artistic skill.
The sessions are set up like a regular figure drawing class.
Sketchers warm up their hands with a series of 1-minute, 2-minute and 5-minute poses.
Throughout the night there are mini-competitions such as Best Eyelashes or Best Comic Strip.
Since then Dr. Sketchys has moved into 100 cities in 16 countries over five continents.
The only two continents without a Dr. Sketchy branch are Africa and Antarctica.
