Wine consultant Barry Alberts, well known for his weekly Coconut Grove tastings, is offering a six-class series, The Grapes, beginning next week at the Deering Estate at Cutler Bay, 16701 SW 72nd Ave., Miami. Meeting every other Wednesday, the 7-8:30 p.m. sessions will focus on top varietals, comparing the properties and pairing possibilities of wines made from the same grape in different parts of the world. Here's the lineup: Wednesday, riesling and sauvignon blanc; Feb. 17, chardonnay; March 3, pinot noir; March 17, merlot; March 31, syrah; April 14, cabernet sauvignon. Cost is $240 for the series.