In a tall mixing glass/shaker bottom, add ice and add rye, Campari, coffee liqueur, and sweet vermouth.
Swirl/stir to combine and chill well.
Strain into chilled glass and top with club soda.
Garnish with either an orange slice or a cherry.
Notes
I bet any high end sweet vermouth or coffee liqueur would work in this recipe. Just stay away from cheap ingredients as your cocktail's taste will suffer.
Recipe by Cooking 4 One at https://www.cooking-4-one.com/2017/06/30/crosswalk/