1.Google is your best friend: “where to play squash nearby?”
2.Check out squash associations websites. They all have a list of clubs and tools that will help you to search by area. These are some good examples.
US Squash
Squash Ireland
England Squash
Squash Wales
3.Once you find the place – go and check it out – talk to the people that are running the club.
Is there a box league in the club?
Do they have a weekly social sessions?
Do they have team in the local league?
Is there a coach that can help you to learn the basics and improve?
An active club in general will have at least 3 of the above.
In the US the sport is getting bigger and bigger. If you are in the East Coast it is definitely easier to find where to play, however the rest of the country is catching up. US Squash is making the right adjustments to grow the game nationally. An example of this is the new junior tournament structure for 2019/2020 where the number of non-east coast tournaments was increased in response to a larger number of people playing outside the east coast.