rooftop cooler

2 oz Dolin Dry Vermouth
1 oz Lime Juice
1/2 oz Simple Syrup
2 dash Peychaud's Bitters

Shake with ice and strain into a Collins glass filled with fresh ice. Top with Canada Dry Ginger Ale and add a straw.
For one of Andrea's drink choices, she asked bartender Matt Schrage for something on the lighter side and he suggested the Rooftop Cooler. I remember trying to order that one evening this past summer while it resided on the menu, but the drink was so popular that they had temporarily run out of the necessary ginger ale to make it. As for who created it, Matt was unsure if it was Kenny Belanger or Phil MacLeod. Once mixed, the Rooftop Cooler offered a lime aroma that led into a sweet, carbonated citrus sip. The swallow was all about the ginger and spice though from the soda and bitters.

Postnote May 7, 2018: The drink is most likely a riff of the Roofgarden from The Old Waldorf-Astoria Bar Book:

Roofgarden
• 1 dash Bitters
• 1 lump Sugar
• 1 jigger French Vermouth
• 1 bottle Ginger Ale
Dash the bitters on the sugar cube in a Collins glass. Build the French vermouth and ice in the glass over the sugar cube, and top with the ginger ale.

The presentation here as I parsed it reminds me of the classic Champagne Cocktail -- one that we often overlook in making or riffing on.