Have you and friends have been drinking and need a ride home?  Here are some links to taxi cab and limo companies.  

Maryland

American Limousines Company

J & I Sedan and Limousine Service

Royal Taxi Cab

Robin's Limousines

Majestic Limo

Deluxe Transportation

Amtrak Train Service

Kangaroo Coach

Virginia

Red Top Cab

Deluxe Transportation

Limo Express

District of Columbia (DC)

American Limousines Company

Deluxe Transportation

METRO

West Virginia

PRT (Personal Rapid Transit)

Mountain Line