I work at George Washington University Hospital. I work on a general medicine unit, and the ratio is 6:1. However, if we don't have a tech, its 4:1 or 5:1. I have not been happy with my unit...The ratio and the frequently absent techs being some of the primary reasons. We usually have several pts on telemetry, but they're primary diagnosis isn't heart related.
With that said, I think the other units are better. We have a Cardiac unit and the ratio is 4:1, maybe sometimes 5:1.
As far as the metro goes, the stop is literally right next to the front door, and they also give an extra 80$ for transportation. If you live in Alexandria, your commute will be a breeze.
Just from hearing people talk, Washington Hospital Center has lower pt ratios. And they're about 7 minutes from a metro stop.
Hope you find a good hospital!