In the bottom of a cocktail shaker, muddle jalapeno. Add mescal, grapefruit, lime, and agave syrup. Add a couple of ice cubes and shake briefly. Strain into a tall glass over fresh ice. Add club soda and stir gently to incorporate. Garnish with a jalapeno ring or lime wedge.
If you choose to drink alcohol, Maine Spirits asks that you drink responsibly.
If you think you have a drinking problem, you should seek professional help.
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