Time travel exists, and I’ve found the portal – it’s called Corvette Diner in San Diego, where the 1950s never ended and milkshakes are served with a side of sass. The moment you approach the stucco ...

But the specialty shakes are where Corvette Diner truly flexes its milkshake muscles. The Peanut Butter Cup creation tastes like someone liquefied heaven and served it with a straw—nutty, ...