The new Courtyard Washington/U.S. Capitol, which opened earlier this month, is using 461.4875 [210.7] for security, engineering, and housekeeping. It appears to be a simplex frequency.
The Red Roof Inn, near the Verizon Center, is using VHF portables. The frequency has not been confirmed, but 154.6000 [ 67.0] was heard in the area in the past.