There are national, state and local discounts for seniors that can start as early as 50, many more are 55, 62 or 65. Here are some of them.
Senior Discounts (many are duplicated)
Restaurant Discounts and Deals
http://frugalliving.about.com/od/frugalseniors/a/Senior_Discount.htm
http://www.alexisabramson.com/senior-discounts-for-all/
http://www.bradsdeals.com/blog/senior-discounts/
NY State – EPIC – Do it in addition to Medicare
https://www.health.ny.gov/forms/doh-5080.pdf
Discounts or Audits at Universities
NYC Arts Cultural Guide for Seniors – Manhattan (while it says 2012 – still current)
Subways offers discounts to those 65+
New York Hotels with Discounts for Seniors
NYC Parks Resources for Seniors
NYC Events for Seniors in NYC)Parks
SENIOR CITIZEN GAMES **
Citizens (60 and older) can purchase reduced-priced tickets for themselves and one guest for select home games during the 2018season. For select games during the 2018 season, fans can purchase tickets in select areas of the Terrace Level, Grandstand Level or Bleachers for $5.
View Senior Citizen Games Now (scroll to the bottom of page)
Amtrak – 15%
FIT – Fashion Institute of Technology – senior residents 60+ can audit courses at a discounted rate.