Theatre Development Fund, a not-for-profit organization, provides support to theatrical works of artistic merit, and encourages and enables diverse audiences to attend live theatre and dance. TDF operates TKTS cut-rate booths at Times Square's Duffy Square, David Rubenstein Atrium at Lincoln Center, and South Street Seaport. TDF Accessibility Programs provides a free membership service for theatregoers who are hard of hearing or deaf, have low vision or are blind, who cannot climb stairs or who require aisle seating or wheelchair locations.