How do I find the right Spanish language course for me?

I had two years of Spanish in high school, and two semesters in college. When I travel to Spanish speaking countries (Mexico, Costa Rica), I’m usually following basic conversations fairly well by the end of my visit, then I return home and lose any small facility that I may have developed. I’d love to take a conversational Spanish course, but I’m having trouble finding anything that fits what I’m looking for (the local community college seems to have only traditional, for-credit classes).

What should I look for? Are there certain key words that I’m missing? Any organizations that you’re familiar with the are geared toward community/work communication? (I’m in Durham, NC, by the way.)