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Falls church is a good location- you're close to a lot of things - Vienna isn't far off, DC is really close... accessible via the mass transit -
My (old lady) opinion based on what i've seen is that falls church is somewhat suburbish... not a lot happening at night, especially if you are a young single guy - DC would offer a lot more (which you will probably pay more for too) but it's pretty accessilbe on the
Metro