For a tapas crawl standing at the bar, you can avoid the charge by politely rejecting the bread basket, I assume, if it’s offered.
But when sitting at a table, we are usually served an aperitivo (amuse bouche) before our starters, along with the bread basket.
For example,
where we’re having lunch tomorrow, at La Raquetista en La Habana, it states on the menu (in small print) that the charge for the aperitivo & pan is 2 euros/person. But the VAT (IVA) is included.
If you decide to have a MENÚ DEL DÍA, (bargain priced set menu of the day) for example, at Casa Macareno on your list, this menú del día will consist of a starter, a main, a dessert or coffee, a drink (wine, beer or water) and bread.
The “average” price for this menu of the day, served for lunch only, and only on weekdays, in Madrid now is €14.
At CASA DANI the lunch menu of the day now costs €14 euros on weekdays and €15 on weekends (Saturday). One can choose from 12 starters, 12 mains, and includes a drink, bread and dessert or coffee. You can see each day’s choices on their Facebook page.
Usually you will see this menu posted outside the restaurant before they open, written on a chalkboard, with at least two options for each course.
(If there is only 1 option per course, a rarity, you’ll need to make sure it pleases all of your party.)
These choices may change daily, depending on what bargains the chef can find at the market (the least expensive cuts of meat or types of fish).
The Lavapiés neighborhood (barrio) is a good place to find these daily menus, at places like Badila, Los Chuchis, El Lugarcito, Rambal (here it costs 19.90). And these are not too far a walk from your apartment, as is el 5 de Tirso off the Plaza Tirso de Molina in La Latina.
Other barrios where you´ll find these cheap eats are Chueca (El Bierzo) and Malasaña (Bogotá).
Here´s another explanation of this menu of the day from 2022, but prices have increased and the Treze menu is served now at their casual tavern, TerZio.