Whether you prefer the walkable downtown or more spread-out areas to the west, it’s easy to find a place to eat in West Palm Beach that’s affordable, unpretentious and delicious. Ethnic food lovers will really find a home. Cuban, Mediterranean, Japanese, Italian, Indian: They’re all here, and many have been around for generations. As part of my series on cheap eats around South Florida, I’ve been searching for restaurants where most entrees cost less than $20.