Personally I took drawing first because that is how the art school I attended said it needed to be. However, art is a very personal thing and, while I find it helps me to be able to draw well before I paint, not everyone progresses the same way. It also depends on what your goal is. Do you wish to simply enjoy the experience of painting? Or do you hope to hone your abilities in order to become an artist?
A drawing class may spend more time on things such as perspective, creating texture and how the human body is put together, but if you are talented you may have already picked a lot of that up. A painting class will generally assume you can draw at least well enough for your purposes and will spend more time on what paints work with what other paints, how to gesso and stretch a canvas, how to finish off a painting with varnish and frames, and what the impact of color is on the viewer.
Then you can also take classes such as in Chinese painting, where the brush is used to draw as well as paint. In essence, these classes are a combination of the two disciplines.
So it is really up to you.