Adam Bernbach (left) tends bar at Benjamin’s Bar Mitzvah as Dan Searing looks on.

There was no hora, chicken dance, or karaoke at Benjamin’s Bar Mitzvah last night. No dinner buffet or pajama pants party favors. But there was an adult version of a Shirley Temple.

Latch Key Productions’ faux simcha last night at the Warehouse Theater was not in fact a coming of age celebration, but a venue to mix up some creative cocktails. It’s part of a planned series of such evenings by Adam Bernbach and Owen Thomson—the duo that make up Latch Key—to feature adult beverages at kiddie-themed parties. But you’ll have to be 21 or older to enter.

The Shirley Temple wasn’t even on the menu, which included Manischewitz laced slushies and homemade wine coolers for $5 a piece. “Nojitos,” including Bernbach’s Mylan and L’Enfant Lemonade, were $8. But a bar mitzvah isn’t a bar mitzvah without the non-alcoholic classic for the 13-year-old set. So when pressed to come up with his own version, Bernbach asked for a few minutes to visualize a concoction. And he delivered. Dr. Brown’s Cream Soda stood in for the ginger ale base with grenadine replaced by Manischewitz (what else?), pisco for a kick, and a splash of lime juice to finish the glass. The cream soda provides a rich, deep base to the drink, balanced well by the unexpected concord grape and citrus flavors.

Perhaps the innovation was spurred on by the duo’s purple slushie, which also used the infamous kosher Mana-wine, pisco, and lime juice as a base. But instead of Dr. Brown’s, the Italian aperitif Aperol served as the key ingredient, along with blended ice. A penetrating, grassy mint accentuated our favorite wine cooler of the evening. The celery/tarragon iteration provided the most promise but lacked the vegetative punch we were expecting. But perhaps that was just a few too many slushies playing tricks on the taste buds.

Thomson mixes regularly at Bourbon while Bernbach, after leaving Bar Pilar, will soon surface at Proof. And while Latch Key’s next party is not yet set, Bernbach will be mixing drinks on his own at the Warehouse Theater the next two Sunday evenings.