Secondary issue, try bracketing, usually if its dark then an extra stop of light is worthwhile. Take at what the camera says then add a stop, give it more time and take a second photo.
what you describe here (as you probably know, but mr_roll may not) is not bracketing but exposure compensation.
exposure compensation is where you know that the meter will be fooled by something, eg a backlit subject, and adjust the exposure from the metered value to suit.
bracketing is where you take multiple shots, usually 3 or 5, at set intervals around the metered value. Many modern cameras have an auto bracketing mode. On mine I can select 3 or 5 shots at intervals of .5, 1, 1.5 or 2 stops. Comes in very handy for HDR shots. If you dont have an auto bracket mode it can just as easily be done manually, can just be a little harder to keep the composition the same between shots is all.