For 'Mad Men' fans, the end of 10 long months of waiting might be reason enough for a drink -- and where better to have it than P.J. Clarke's, one of New York's most storied watering holes? The famous bar is also a favorite of the on-screen Sterling Cooper staff.

As the show marks the beginning of the end of an era, we asked Gerry Biggins, P.J. Clarke's resident quick-witted Irish bartender, to share his recipes for some classic, 'Mad Men'-esque cocktails with us.

Old Fashioned

Originally called a whiskey cocktail, this classic obtained

Originally called a whiskey cocktail, this classic obtained its new name during its prime in the 1800s. The earliest known description of the newly-named “Old Fashioned” was in 1886.

Classic Old Fashioned:

One jigger bourbon

Four dashes bitters

Two sugar cubes

Splash club soda

Orange wedge & maraschino cherry finish

*Serve over ice and heated conversation

(Credit: Flickr/preater)

Tom Collins

Though popular in the decades after Prohibition, this

Though popular in the decades after Prohibition, this gin cocktail was named after a notorious hoax in 1874. The prank involved telling a friend that you just heard someone named Tom Collins saying nasty and libelous things about you. The friend then runs all over town searching for a Tom Collins who doesn’t exist.

Tommy Collins:

Two Parts Brooklyn Gin

One Part Maraschino Liqueur

One Part Simple Syrup

Finish With Lemon Juice & Club Soda

*Best served in a Collins glass and in the company of an old friend

(Credit: Flickr/pwkpwkpwk)

Sidecar

Legend has it an American army captain in

Legend has it an American army captain in Paris who liked to ride in a motorcycle sidecar invented this cocktail in the 1920s. But some say the name comes from what bartenders call "sidecar" -- the leftover liquor they pour into shot glasses.

Patrick Joseph Clarke Sidecar:

2 parts cognac

1 part cointreau

Top with fresh lemon juice & a lemon twist

*Shake well and serve after the delivery of a proper toast

(Credit: Flickr/Juan Barahona)

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