I have to admit I was deeply skeptical of this concept, and was braced for the worst when I entered the local outpost. I left pleasantly surprised.
Kathy Bergstrom (who owns the store with her daughter) was warm and welcoming and let me browse to my heart's content. The shop has stucco niches for the wine (very old world, and it makes the most of the deliberately small store selection), and I was struck by the fact that many of the wines were not on every other store shelf in the LA area. Sparkling German Riesling? They've got that. Portuguese table wine--of the sort we were all searching for a few months ago?--yeah, that, too. Smaller labels like Anglim? Yes. A great selection of Italian wines, like the Di Majo Norante Ramitello and bottlings from Renato Ratti? Absolutely. And a good selection of 2000-2005 red Bordeaux for under $40? Check. They've also got their own line of Clos la Chance "style" bottlings, but I'm not sure why you'd go for them when they have so many interesting options under $20.
One of the real enticements for those strolling through South Pasadena is the tasting area, which is 1/2 of the store. Cozy leather chairs, tables, and tall bar stools provide ample room for sitting down and enjoying the wine and nibbles they feature at their wine tastings which are held Thursdays from 5-9, and Friday/Saturday 5-9:30. Even with all that seating, the place can get crowded Fridays after work. The cost for tasting 5 wines varies by selection, but is usually $10-$15. Last Friday, for instance, they had a lineup of California Zins for $10, including the 2003 Red Horse Ranch and the 2005 Klinker Brick Old Vine.
Wine Styles does have a wine club, which gets you two bottles of wine for $34.99 a month as well as discounted tastings and purchases.
If you are local, or visiting Pasadena, check it out and see what you think. This is not a chain like BevMo, with an enormous stock. The selection is small, but nearly every wine I saw was interesting and tempting. Well worth the stop, if you are in this area.