Maybe it is because I went on a Monday night and they had the poorer artist that
night. I am a big Flamenco fan and go to Flamenco a lot---she was the worst
dancer I've ever seen, bar none. And, she only danced ONE dance (which was a
blessing, given the poor performance). Plus there was no male dancer at all. I
felt really sorry for people who had never seen flamenco before and were
introduced to it this way. If I could give this place zero stars I would, but I
guess it earns one star for the ambiance. It might be better on other nights,
but I suspect the better dancers (in higher demand) go to places that pay them
well---which means the places that charge you more.
Still, you get what you pay for: Carboneria is free, but you will need to buy
drinks (and possibly want some tapas), and the quality of the available food and
drink is also TERRIBLE. You will wind up paying as much for bad flamenco as if
you had sprung for a bit more and gone to a better show. And at the better
shows, you see a lot more dancing, too.
I have studied flamenco but am a novice; however, I've attended literally dozens of performances in Spain (and in other countries, when the professionals from Seville go on tour). Still I don't recommend the expensive tablao dinner shows around Seville (although they may command the best dancers); you can see really excellent flamenco for much less. We saw the best Flamenco of our entire Spain trip at the very nearby La Casa del Flamenco in the Alcantara Hotel, for 18 Euros. That is a better show and one I really recommend, with relatively intimate seating in a lovely setting and VERY talented artists---but it sells out totally, so you will need reservations. If you can't get in there, then try "Casa de la Guitarra"; same price as Alcantara and also nearby, and a much better show than Carboneria (but not as good as Alcantara's). However, in both of these locations, there are no refreshments available.
I don't understand the reviews that laud this place, unless they went on a night when better talent was on display. This venue was a waste of time and I'm sorry we went, instead of looking for a better flamenco location.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.