How to Make It
Combine sugar and grapefruit strips in a wide-mouth pint jar. Muddle until mixture is sandy, about 1 minute. Add habanero; muddle until crushed and incorporated, about 30 seconds. Add water. Secure lid on jar, and shake until sugar is dissolved, about 40 seconds. Pour through wire-mesh strainer into a bowl, discarding solids.
To make shandy, pour grapefruit juice and 1 tablespoon syrup into an ice-filled Collins glass; stir to combine. Stir in beer. Garnish with a grapefruit wedge sprinkled with chile-lime seasoning salt.