One cold February night in 2013, Tom Gerhardt and Dan Provost ducked into a Brooklyn bar for a drink and some R&D. The two friends and designers, co-owners of a firm called Studio Neat, had both gotten into mixology recently. They were wondering what their in-home bars might be missing. Like so many people do, Gerhardt and Provost found the answer in the bottom of a glass. The Clover Club is one of Brooklyn’s best cocktail bars. It’s just fancy enough that you’re willing to spend $14 on a cocktail, but not so fancy the bartender can’t serve you something …