Combine Sauce Ingredients: whisk ketchup, horseradish, lemon juice, Worcestershire, hot sauce, and pepper in a bowl until smooth, bright red, and zesty (about 2 minutes).

Chill Sauce: cover in an airtight container and refrigerate for 15 minutes so flavors meld and the sauce thickens for that perfect sip.

Prep Glasses: nestle ice cubes into shot glasses just before assembling shrimp to keep shooters crisp, chilled, and ready to impress guests.

Add Sauce: carefully spoon chilled sauce to fill each glass one-third full, showcasing its vibrant hue and zesty texture for a balanced bite.

Hang Shrimp: drape three shrimp per glass, letting tails rest on the rim for easy sipping and a classy finish that delights every guest.

Garnish & Serve: tuck celery sticks and herb sprigs into the sauce for a crunchy contrast and fresh aroma in every refreshing shooter.