What is a non strenuous part-time job for someone who can work nights?

What is a god job for someone with a B.A. who needs some extra cash temporarily? I already work full-time during the day, but I need extra cash to pay off a hospital bill. Waiting tables/bartending is no good because bartending requires expensive training and waiting tables is just not for me. Any other suggestions? Anything that is just weekends would work the best.