Wallet Card at South Shore Pools

I noticed this sign under the awning of a nail salon in Woodmere, NY.

Not the oldest sign, but I think it's 40-50 years old. The nail salon has been there since at least 2007, probably a lot longer. I can't find online any mention of a South Shore Pools in Hewlett. There is no area code in the phone number, which likely dates it to at least the 1980s. Putting the word "phone" next to the phone number is also an older style, so I would not be surprised if it dates to the 1970s.