Between October 9–15, 2006, tap your Citi® credit or Citibank® Debit MasterCard® card or payment tag with PayPass® on the from 138th St. stations, Bronx to Borough Hall, Brooklyn at any turnstiles marked with the symbol to receive up to 20 free subway rides, compliments of Citibank and MasterCard.
This offer may be combined with the NYC Subway Trial Pay-As-You-Go 3 Free Rides offer or Pre-Pay 6 Free Rides offer. Participants will receive any remaining free rides under those promotions first, with up to an additional 20 free rides available during the Ride Free week. Maximum number of free rides available during Ride Free week will not exceed 23 free rides for Pay-As-You-Go participants or 26 free rides for Pre-Pay participants.
from 138th St. stations, Bronx to Borough Hall, Brooklyn at any turnstiles marked with the 
symbol to receive up to 20 free subway rides, compliments of Citibank and MasterCard.