Lest you've missed it, the Flickr set of "Bars in Logroño" has been posted to the right for just about 3 days.
There're several dozens of bodegas around Logroño, the capital of La Rioja, which makes it a perfect pivot for a vineyard tour in La Rioja. It's a small town with a population less than 150,000 and there's virtually no bus or tram in the town whatsoever. The only public transportation available, if it counts, is the taxi. If you hate the idea of getting around everywhere by a taxi, my advice is to either go for a car rental or to spend nights in a hotel that's right in the centre of all the actions. The one I lived was called Marques de Vallejo, which is pretty sleek and within stone-throw distance to more or less all the places I needed to go, i.e. bars and restaurantes!
For serious bar-diving and tapas quest, among all the streets ("calle" in Spanish) in Logroño, there's only one you'd need to know: the one called "Calle del Laurel." This is the place where all the bars nestled in. A few blocks away, there's also a street called "San Juan," but it's less happening when compared with Laurel.