IT’S just one more anonymous warehouse here in a mundane industrial district, but within its humble walls lie 23,000 temperature- and humidity-controlled square feet of Garagiste, one of the quirkiest, least-known retail treasures in the wine world. Least-known, that is, unless you are one of the 127,000 or so people who receive daily e-mails offering a trove of unusual bottles, described in beguiling detail by Jon Rimmerman, Garagiste’s founder and owner and guru of the wine disenfranchised.