Fill a chilled wine glass or Collins glass halfway with ice.
Pour in 1½ oz. chilled sparkling wine, 1½ oz. vodka, 1¼ oz. dry vermouth, ¼ oz. olive brine (preferably Castelvetrano), and 1–2 dashes orange bitters; stir gently to combine.
Pour in 1½ oz. chilled club soda or seltzer and stir again to combine.
Express one 3"-long strip orange zest over the drink; discard.
Thread 3 pitted olives (preferably Castelvetrano) onto a metal straw or cocktail pick and place in glass.
