Yes.
Only on the club level, which is reserved for the upper-class (corporate) fans.
162 (81-81)
For the franchise history, that is 31 games by Vladimir Guerrero in the 1999 season. For the Washington Nationals part of the franchise history, that is 30 games by Ryan Zimmerman in the 2009 season.
The Washington Nationals play at Nationals Park, located at: 1500 South Capitol Street, S.E. Directions can be found at http://washington.nationals.mlb.com/was/ballpark/directions.jsp
71-91 was their win-loss record in 2006.
Wil Cordero played in 3 games at designated hitter for the Washington Nationals in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Jose Guillen played in 2 games at designated hitter for the Washington Nationals in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Marlon Anderson played in 3 games at designated hitter for the Washington Nationals in 2006, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Matt LeCroy played in 2 games at designated hitter for the Washington Nationals in 2006, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Jose Vidro played in 2 games at designated hitter for the Washington Nationals in 2006, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Daryle Ward played in 3 games at designated hitter for the Washington Nationals in 2006, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Dmitri Young played in 7 games at designated hitter for the Washington Nationals in 2007, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).