Using a jigger or measuring cup, add vodka, rum, tequila, gin, blue curaçao and sweet and sour mix directly into the glass.
Use a bar spoon to gently stir the mixture, ensuring the ingredients are well combined.
Top the cocktail with the club soda, leaving a little space at the top of the glass.
Gently stir once more to incorporate the soda.
Garnish with a lemon wedge, if desired.
Notes
To make your own sweet and sour mix, combine equal parts of lemon juice, lime juice, and simple syrup. This will give you a fresher and more customizable mix that you can adjust to your liking. Store the homemade mix in the refrigerator for up to one week.