Whole Foods Market, one of the largest chains of organic and natural foods and beverages in the US, has begun adding beer and wine, served by the glass, to its product lineup.

Currently in a test phase, Whole Foods Market expects to have bars opened in 20 or more stores by the end of 2012.

According to a report in USAToday, the grocery chain will be selling wine for $4 to $10 a glass, and growlers of beer for $6.99. A blog post on the Better Business Bureau’s website points out that this will give Whole Foods a low cost way to make a lot of money, as the profit margin on served beer and wine is high.

Walter Robb, Whole Food Market’s Co-CEO, told USAToday that “Coming out of the recession, people are looking for affordable luxuries and more intimate experiences.”

So far, bars have been set up in Whole Food stores in California, Arizona, Texas and Illinois. Whole Food Market’s flagship store in Austin, Texas, is the most recent one to open an in-store bar. The bar has seating for 20.

Analysts say this will be a benefit to Whole Food’s bottom line and will boost the amount of time that consumers spend in stores.

Whole Foods Market Inc. was founded in 1980 and now has more than 300 stores in the US and the UK.