The business, which was primarily a wholesaler until moving to its Montpellier Walk shop last autumn, opens the cellar space for customers to enjoy drinks on the premises, but has also utilised it to host events such as a whisky tasting and a demonstration of Riedel glasses.
Owner John Gordon Duff said: "It's increased the total shop space by a considerable amount. The shop here before was a patisserie. Customers were coming in expecting it to be a patisserie and finding it was a wine merchant.
"Now people can come in and relax, and of the people who sat down for tea or coffee last Saturday, 60% came up and bought a bottle of wine.
"It was a functioning area but it had not been put to proper use. The wiring was badly done and it had a low ceiling, but we've raised it slightly and put some new lighting in."
The cellar seats up to 30 people, in addition to existing space upstairs and outside the store for up to 50 more covers. The shop also offers a selection of cheese and pâté.