Orange bitters
Since most bitters are used by dashes or in drops, the amount of alcohol is minuscular, making the alcohol by volume hard to trace. Sometimes they are marketed as non-alcoholic, although they are made from alcohol. Orange bitters aren't usually bitter, but tart, and citrusy. Some cocktails can be bitter, depending on the other ingredients in them.
Orange bitters is also great with
Tuxedo
The Tuxedo is composed of gin, dry Vermouth, orange bitters, maraschino and Absinthe. It's very similar to the imperial cocktail, which adds maraschino to the combination of gin and dry vermouth. Related to the martini, the Tuxedo has had many variations since its inception in the 1880s. The cocktail is named after the Tuxedo Club in Orange County, New York where it was first mixed.
Casino
The Casino is an IBA official cocktail made with gin, maraschino liqueur, orange bitters and fresh lemon juice. The Casino, which appeared in Harry Craddock's 1930 Savoy Cocktail Book, falls into a category of cocktails called Daisies. Each of these drinks includes a spirit, citrus, and a flavored sweetener.
Dry Martini
The martini is a cocktail made with gin and vermouth, and garnished with an olive or a lemon twist. A dry martini is made with little to no vermouth. Ordering a martini "extra dry" will result in even less or no vermouth added. By the Roaring Twenties, it became a common drink order. Over the course of the 20th century, the amount of vermouth steadily dropped.
Manhattan
A Manhattan is a cocktail made with whiskey, sweet vermouth, and bitters. While rye is the traditional whiskey of choice, other commonly used whiskies include Canadian whisky, bourbon, blended whiskey, and Tennessee whiskey. Popular history suggests that the drink originated at the Manhattan Club in New York City in the mid-1870s, where it was invented by Iain Marshall for a banquet hosted by Jennie Jerome.
Chicago Cocktail
The Chicago Cocktail is a brandy-based mixed drink named after the city of Chicago, Illinois. It appeared in multiple cocktail manuals dating back to the 19th century. The main ingredients are brandy, triple sec, and bitters. Some versions do call for the Champagne to be added.