I recently found this website:
https://coinatmradar.com/Apparently there are more than 3400 ATMs across the globe and it's growing at an exponential rate:
https://coinatmradar.com/charts/#growthOn this website you can easily find an ATM near you, I had an idea like this myself for a website but it seems someone was faster than me. There is ad space there, I would consider it if I wanted to promote something, the website it's pretty cool, good design, excellent ranking in google, SEO wise it's a good deal.
The last time I checked they had some information not updated for a long time, making it questionable as to the quality of the rest of the info, but still, it is the best source of data on Bitcoin ATMs out there.