Apparently the Capital Bikeshare network includes a secret station located inside the White House security perimeter:
Located just inside the gate on State Place at 17th St, NW the station can only be used by those who can actually get inside the White House’s security perimeter. And it’s for that reason, not national security, that it doesn’t show up on the map. DDOT doesn’t want users making plans based on that station and then finding they can’t get to it.
According to DDOT the station, which only has 9 docks, does get used by daily commuters.
This seems in some ways like it would put a large hole in White House security procedures.