There are multiple AAMPs in Tysons.  Some are K-orgs and some are C-orgs.  You'll pay escort prices, but will see a hot Asian girl in her 20s.  The J-girls almost always have a BBFS option, if that's your thing.  The K-orgs tend to have much more intrusive screening than the C-orgs.  It's about a hour drive+ from Baltimore and you have to cross the American Legion Bridge on the DC Beltway.  The bridge area has been under construction forever.

If you prefer standard walk-in AMPs, there are several in the Greenbelt area.  The girls tend to be older, but the offerings are pretty reliable for typical AMP donations.  An added advantage is that it's a much shorter drive:  30-40 minutes on I-95 or the BW Parkway.  

I've tried a couple of AMPs in Baltimore over the years without a lot of success.  I would definitely make the drive to Greenbelt or College Park for a standard AMP experience.  If you want to splurge and have the time, cash and are willing to put up with screening, go down to Tysons.  

Just for the experience, everyone should take a walk around The Block at least once in their mongering careers.  It definitely isn't what it used to be.  But, if you want to experience what old-time shipyard & blue-collar strip clubs where anything goes, go for it just for the experience.

I've not heard of any K-agency or indie K-Girls located "in" Baltimore. I would not equate K-girls and massage parlor girls even if they are Korean. Greenbelt, as mentioned, is probably the closest for you. However, if you're on the north side you might look into something in Phili or in NJ. There were a couple of K-agencies located in NJ that seemed to have the same girls that show up in Tyssons, NY and Phili.

Mostly just have to figure out which is the easiest drive and if you want to make it.

Maps, Rub, Massage, Baltimore on Google.

This website has a very active Baltimore thread and just read about an older asian service near bwi