Tarzan

Campari and pineapple juice are a match made in heaven. 

1oz London Dry Gin
1oz Campari
1.5oz Pineapple Juice
.5oz Simple Syrup
.5oz Lemon Juice
Soda Water

Shake everything except soda water over ice. Double strain into a Collins or highball glass with fresh ice. Top with a couple ounces of soda water. Garnish with some orange.