Ibhari
Sidrería el Tigre
bayi 73 abantu basekuhlaleni abayincomayo,
Indawo
23 C. de las Infantas
Madrid, MD
Amacebiso asuka kubantu basekuhlaleni
Cheapest tapas restaurant, not best but really on budget, where you can eat just by ordering a couple of drinks - all the food served for free
Is next to El Respiro, maybe a little bit more crowded, due that the tapas are a little big bigger here. It's full after work (from 7pm-8:30pm).
El tigre is a great place to go because with the purchase of a drink (some cider, perhaps) they give you a TON of tapas. I believe a cider costs 5 euros.