The Chelsea Hotel is a simple cocktail that’s actually strikingly similar to The Bernardo posted previously. Balance and subtlety are extremely important with cocktails though, and the omission of bitters makes a tremendous difference.
1 1/2 oz Gin (Bluecoat works well)
1/2 oz Triple Sec
2 tsp Lemon juice
Pour all ingredients into a shaker half-filled with ice, shake well and strain into a cocktail glass. Plus, it may be a hassle, but freshly squeezed citrus juices will vastly improve any cocktail.