There's a free life drawing class Monday evenings in TSH. It starts 1 or 2 weeks into the semester, and they usually post a notice about dates and times on the main floor of the building.
There's also an art club. You can see their info in the club directory on the MSU's site.
If you want to just paint by yourself, there's usually floor space on the upper floors of MUSC.
Hope this helps!
Steph