There are of course exceptions; as there are to every rule.
We all see businesses -- small old eating places, drinking places, retail stores, some dance businesses -- that have been surviving for a long time without growing.
To understand how they do that, look at their expenses; especially those that usually tend to be the most difficult to cover: facilities, personnel, advertising, living expenses of the owner, and other fixed-cost overhead.
Do these surviving places pay rent or a mortgage; or is the property paid off? Do these places pay employees or contractors; or is it family labor? Do these places pay for advertising; or do they rely on other methods to bring in business? Does the owner need to cover living expenses from the business; or are they covered by other income sources?
Businesses which have low or declining expenses do not require growth for survival.
But most social recreational dance businesses have expenses that, for one reason or another, grow over time, and thus, in order to even survive, their revenues must also grow.