When I first heard Singlebarrel was changing their concept, I was very concerned. Immediately I thought that the best bar in Silicon Valley (and perhaps the Bay Area) was in jeopardy. Seriously, what are the chances that they could actually improve on such an outstanding product?I'm happy to say that my worries were not warranted one bit. I finally checked out Haberdasher last week and was completely blown away!Haberdasher means to make or manufacture with skill and careful attention to detail, and is most commonly used in reference to tailoring--explaining the theme. Walking in, the ambiance was already a big improvement. You'll find classy dimmed Edison lights hanging from the ceiling and hidden inside bollard hats. There is more bar space, most casual seating, and comfortable seating for reservations (more on that in a moment). The soundproofing is also amazing. People can talk at a normal volume now and the hushing has been replaced with some nice music.One of my favorite upgrades is that the huge line outside and the 6-person party limit are completely gone! Haberdasher is designed to provide quality craft cocktails more efficiently than before while maintaining the same quality and level of service as Singlebarrel, if not exceeding it.You have two options when drinking at Haberdasher: 1.) Make a reservation. You'll get the best seats and the bartender will come to your table for fully custom-tailored craft cocktail experience, usually with multiple "courses." 2.) Casually walk down to the bar area and order off of a menu of the best craft cocktails Singlebarrel had.How is #2 even possible without a huge line you may ask? Their most popular craft cocktails are on draft. They make them from scratch in large volumes before opening the bar each day. You can still order a customized cocktails at the bar, but their "craft on draft" handles a large number of the orders. I can vouch that the Old Fashioned on draft is just as good if not better than Singlebarrel's. There is also a Moscow Mule where you get to keep the copper mug, Gin & Herb Tonic, Whiskey Ginger, and Montenegro Amaro on tap. There are 8 "house fittings" drinks that are more complex and are made to order from scratch. My wife opted to get a Singlebarrel classic that was not on the menu... the Rum Flip. Not only was it as good as it has always been, but they brought it out in an old-fashion mini milk jug. Nice touch!Other additions to the menu include outstanding non-alcoholic craft sodas, low alcohol drinks, craft beers, and snacks (brisket jerky, chicharrones, garlic almonds, etc.).So in summary, go check out Haberdasher! The best bar in Silicon Valley is now even better. They managed to further innovate the local craft-cocktail scene!Haberdasher is located at 42 W. San Salvador St. For more info and for reservations, head here.