Fill your beer mug with ice to chill.
In a cocktail shaker, add: gin, vodka, tequila, white rum, triple sec, bourbon, overproof rum, Scotch, lemon juice, lime juice, and simple syrup.
Add ice to the shaker and shake well (10–15 seconds).
Strain into the prepared beer mug.
Add the stout and pale beer. Stir gently.
Top with club soda, sparkling water, or champagne.
Garnish with a citrus wedge if desired. Serve cold.