In large saucepan, heat beer, salt and garlic to boiling. Add shrimp; heat just to boiling. Reduce heat; cover and simmer until shrimp are pink, 3 to 5 minutes. Drain; serve shrimp with sauces. Each person peels their own shrimp so be sure to provide a container for the shells.
Cocktail Sauce: Mix all ingredients.
Lemon Butter: Heat all ingredients over low heat, stirring until butter is melted.