Enter your monthly fee (set frequency to “per month”). We total the year and the decade so you can judge it against how often you actually go.
If it motivates you, keep it. If it is a forgotten line on your statement, the invested figure shows the alternative.
How it's worked out
Yearly cost = price × times per week × 52. The “if invested” figures assume you put the same amount in each year and it grows at the rate you set (default 7%) — an ordinary annuity. They're estimates to show scale, not guaranteed returns.