Houseplants for very dark office.

[hisgirlfriday]

Not sure if this should be gardening or good housekeeping.
Does anyone have any recommendations? My office has a small window which faces onto a brick wall. I need some greenery! However, the office is very dark, there is artificial lights, of course, but its very gloomy if they're not on.
Any bombproof houseplants out there that could beat the gloom? Prefreably something leafy, I hate cacti.

Thanks

mother in laws tongue?
Thats fairly bomb proof,and is the kind of plant thats supposed to filter pffice air better.