For parties or some laid back fun, people look for cool easy art drawings. Oftentimes, people now will go to the pub for adult paint nights. It can be a great way to have a drink, socialize, and learn some art.
These type of drawings are usually simplistic. For example, a landscape of trees is a good beginning. Tree are relatively easy to learn how to draw.
Another good beginning item is the water drop. The water droplet dropping into a pool of water is a good study on dimension. It allows the person to really delve into blues and purples as well.
People love to draw faces. Faces do take considerable talent. A person cannot necessarily just draw a face from first glance. It takes some lessons. However, many people consider this extra training worth it in order to be able to do portraits. Anyone loves to sit and have their portrait done by an artist.