The menu is an interesting melange of Mexican dishes, fresh seafood and vegetarian creations, whose prices run from 99 cents to $13. Cabo’s 156 seats are filled at lunch and dinner by a clientele that ranges from high-powered lobbyists and legislators to aging hippie carpenters to middle class families. But while much can be said for the food, atmosphere and prices of Cabo’s, its success is a tribute to attitude. Because it is Ferrara’s surf-bum charisma and enthusiasm — balanced by Staerker’s common sense and restaurant experience — that has made Cabo’s an advertisement for small business.