Suggestion for Online Calendar and Bookings for Fitness Website

Hi All

Apologies if this is in the wrong section of the forum.

I run a fitness studio and need something that my clients can book and view upcoming session/classes events. Paying online is a bonus, but not a necessity.

I am Currently using Zenplanner for Calendar and Bookings on my site. but for the small amount that I use it, I am battling to justify the cost.

I have also tried Bookwhen.com but it doesn’t offer a function to count how many sessions a member has left.

Can anyone suggest a simple, cheap calendar that can record the amount of sessions a memeber has left.

Regards