In a curious experiment initiated by ORGANIZATION@1 columnist PERSON@1 , ORGANIZATION@2 donned a baseball cap and played as an incognito street busker at the LOCATION@1 subway station L'Enfant Plaza in LOCATION@2 , LOCATION@3 on January NUMBER@1 , NUMBER@2 .

In an unusual experiment the ORGANIZATION@1 asked ORGANIZATION@2 to stand in the street and busk -LRB- play his violin -RRB- by the entrance to a LOCATION@4 station one cold morning in January NUMBER@2 .
