As the “tx” in the name suggests this is a Basque tapas bar specialising in that region’s “pintxos”. The place is standing room only and even then you’ll have to fight to get a place at the bar. Because of this it’s really a place to come as part of a tapas pub crawl rather than spend the whole night here.
“Pintxos” are traditionally something stabbed with a cocktail stick and placed on a small piece of bread. Here they are pretty fancy and are some of the best in La Latina. They seem quite expensive at first but they’re pretty filling. You don’t need many to have eaten a full meal. The tapas are all on display so just point to what you want and they’ll serve them up to you.
There is a sister bar with the same name in Sol on Calle de la Cruz, 11