I very rarely used the local public pool when I was a kid because my aunt and two of my best friends all had pools and I preferred the privacy their back yards afforded. But when I did go to the public one (for parties or swimming lessons, usually) I was always amused by the sign on the front gate: Welcome To Our Ool. Notice There Is No P In It. Please Keep It That Way.

BTW, have you ever noticed what a ridiculous word 'pool' is?