If you know, you know. Tucked away inside 10th Ave Burrito, Fish & Whistle is Belmar’s not-so-secret speakeasy-style dive bar—a hidden gem where the cocktails are creative, the decor is quirky, tunes flow easily, and nobody takes themselves too seriously. Equal parts neighborhood hangout and unexpected escape, it’s the kind of place you stumble upon once and then spend the rest of the summer bringing your friends. The place has become a neighbor…