| Business | Phone |
| American Symphony Orchestra Lg 910 17th St Nw # 800, Washington 20006 | (202) 776-0215 |
| Mid-Atlantic Chamber Orchestra 2500 Q St Nw # At, Washington 20007 | (202) 483-9320 |
| National Symphony Orchestra 2625 Connecticut Ave Nw, Washington 20008 | (202) 467-4600 |
| Washington Bach Consort 5125 Macarthur Blvd Nw, Washington 20016 | (202) 429-2121 |
| Va-National Medical Musical 1700 17th St Nw # 508, Washington 20009 | (202) 797-0700 |
| Solo Swing 1712 19th St Nw, Washington 20009 | (202) 462-2129 |