Ahh, happy hour. That brief, shining window, generally during weekday afternoons and early evenings, when bars roll back drink prices in an effort to lure in customers. But while bars are still great sources of happy hours, plenty of restaurants are offering them, too. And not just on drinks — they're knocking back prices on food as well. In fact, some of the country’s most popular chain restaurants offer little-known menus featuring incredibly inexpensive food and drink specials, usually available only at the bar. We’ve rounded up the top 15.