TrainAway might be a bit more popular than Crossfilter. We know about 1 link to it since March 2021 and only 1 link to Crossfilter. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
There is a library called Crossfilter developed by Square https://square.github.io/crossfilter/ Could be useful. Source: over 2 years ago
Trainaway.fit is probably the closest thing to what you mentioned, as they cover many countries. However, they only sell day passes. I used them a few years ago. Source: almost 2 years ago
FitCliq - Tinder for fitness
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Vizable - Turn your data into beautiful, interactive graphs on iOS.
Gympass - Gympass is a fitness discovery platform connecting the world's network of fitness facilities to companies and its employees.
Fitt - Discover health & fitness in your city
Gymphy - Create free shareable workout plans