Neither our hotel, nor any of the other local hotels or banks do exchange of foreign currency. If you need US cash you have three options: bring it with you from your country, or go the Foreign Exchange Office at BWI Airport, or go to the American Express Travel Office in downtown Baltimore.
Travelex Currency Exchange at BWI:
They have two offices at BWI. One is at the International Pier (Concourse E, 2nd level, next to the Information Desk) with the hours of 1pm to 9:00pm (= 1300 to 2100 hours) 7 days a week. The other one is at the Domestic Terminal (Concourse C, 2nd level) with the hours of 8:00am to 8:30pm (= 0800 to 2030 hours) 7 days a week.
American Express Travel Office:
100 East Pratt Street
Baltimore, MD 21202
Hours: Monday to Friday 9am to 5pm (= 0900 to 1700 hours).
This office is located in downtown Baltimore. It will take about 30 minutes by car to get there from the convention.
Most other major airports will likely also have an exchange office.