1 1/2 ounces citrus-flavored vodka
1/2 ounce triple sec (Cointreau, preferably)
1/2 ounce or more cranberry juice
1/4 ounce lime juice

Shake with ice, strain into a cocktail glass

Orange twist, for garnish

This rather complicated drink nonetheless is amazingly tasty. Would be great as a "foam" on top of a G&T.

2 ounces gin
1/2 ounce fresh lemon juice
1/2 ounce fresh lime juice
1/2 ounce simple syrup
1 egg white
1 ounce heavy cream
1 dash orange bitters or 1/2 teaspoon orange flower water (A. Monteux in a little blue bottle comes recommended)
about 2 ounces of seltzer (optional)

Put your serving glass and the bottle of your whipped cream maker in the freezer to chill.

2 oz. bourbon
½ oz. pimento (allspice) dram
¾ oz. fresh lime juice (~1 lime)
¼ oz simple syrup
1 dash Angostura or orange bitters

(Tweak pimento dram and lime juice to taste)

(Can drop the simple syrup and replace bourbon with rum)

(a dash of Benedictine DOM also rounds it out well)

Some history: http://badassdigest.com/2012/09/14/your-guide-to-drinking-this-w...

DC's signature drink, the Rickey, is "an airconditioner in a glass" as Columbia Room's Derek Brown puts it, and fiendishly simple. While the original uses bourbon, I prefer the gin version.

In a highball with ice, add in:
The juice of a key lime (and both shells, or the juice of 1/2 of a normal lime and a dash of simple syrup or an orange syrup)
2-3 oz of gin - and, for DC's own drink, use Green Hat, DC's own gin.
fill the glass with sparkling mineral water (pellegrino works well)

From http://backyardbartender.blogspot.com/2011/06/mxmo-lviii-carmen-..., yet another way to use Poire William, this time with balsamic syrup:

1 oz Poire William eau-de-vie
1 oz cachaça (I might sub in a darker rum here?)
1/2 oz balsamic syrup (Make it from scratch with her recipe here: http://backyardbartender.blogspot.com/2010/10/el-sangre-de-fresa..., or buy it at a gourmet grocery store)
1/2 oz Cointreau
1/2 oz fresh-squeezed lime juice
dash of orange bitters
club soda

Back in Austin, Trudy's has an epic drink called the Mexican Martini. Epic enough such that there's a relatively strict 2/person limit. Luckily, there are multiple Trudy's in town...

The recipe is somewhat contentious. Many have tons of orange juice and even sprite in the recipe, but I remember hearing from a trusted source that there was definitely a bit of rum in the mix. You're aiming for a strong and slightly briney margarita, shaken and served up.

Juice of 2 limes
3 oz tequila (or split with mezcal)
1 oz cointreau
1 oz rum
1 oz orange juice
dash of olive brine

Combine in a shaker with ice:

The juice of 1/2 orange
The juice of 1/2 lime
The juice of a lemon

half oz of brandy
sweet syrup to taste

Add a nice fruit-forward red wine (jammy cabernet blends work well)

Shake to chill, serve in a margarita glass with plain soda or ginger ale, garnish with orange and lemon slices plus berries and mint sprigs

A custom cocktail from the master mixologists at Wisdom.

Via The Hill is Home:
Since it’s from our friends at Wisdom, it has an extra dose of awesome. So, here it is, from the head bartender, the Porque Hola! (aka, “Why, hello” en mal Espanol) ... According to owner Erik Holzherr, it”s, “a perfect summer drink that is extremely refreshing but with a fun and unique kick…this drink will appeal to die hard margarita drinkers and novices as well.”

4.0 parts White Rum or Cachaca (cut down the sugar if using cachaca)
3.0 parts lime juice
3 sprigs of Mint
2 teaspoons Sugar
Soda Water (or just water)

In an old fashioned glass, muddle most of the mint with sugar and slices of lime plus a dash of lime juice. Add in ice, Mix in rum and soda water. Garnish with sprig of mint.

Wikipedia has a good writeup of the Dark n Stormy, but it is a classic Caribbean/seafaring drink - dark rum, a bit of lime, and ginger beer (DG brand works best).

In a highball with ice, add in:
The juice of a key lime (and both shells, or the juice of 1/2 of a normal lime and a dash of simple syrup)
2-3 oz dark rum (Myers or Flor de Cana)
If your ginger beer is not sharp enough, consider adding some ginger syrup.
Fill with Ginger Beer to taste.

A slight dash of vanilla can also amp it up.

3 parts tequila
1 part Cointreau or Triple Sec
1/2 part Lime eaux-de-vie (or add in a dash of agave simple syrup and more lime juice)
juice of one lime

Serve in a margarita or cocktail glass rimmed with salt using lime juice, garnish with a thin slice of lime

1¼ oz vodka
3 oz ginger beer
1 tsp sugar syrup
¼ oz lime juice
1 sprig mint
1 slice lime

In a copper mug or low tumbler glass, pour vodka over ice. Add sugar syrup and lime juice. Top with ginger beer and stir.

Garnish with mint sprig and lime slice.