The 70 Visit Gym
Start a gym that costs more than most, billed monthly.
Keep a track of people’s visits (combine with facial recognition or something to stop cheaters).
If you visit on 70 different days during the year, the whole next year is free.
People will think that is not much more than once a week, which is easy if they were planning three times a week.
People will assume they will reach the goal, so in their mind the monthly fee is half what it is.
Yet few will actually achieve it.