If the light is low then you will either be needing to get artificial light in there or use a longer exposure. If you are going for a longer exposure you will more than definitely benefit from using a tripod (which I didn't see you mention)
A lot of publicity brochures tend to use nice 'arty' shots with little relation to the actual place they are promoting, maybe a few shots of the bar pumps etc would fit in well.
Just thinking off the top of my head here by the way