The Sant Antoni vermut bar with the Carrer del Parlament terrace — the neighbourhood's busiest aperitif room.
Bar Calders sits halfway down Carrer del Parlament in Sant Antoni, the slow pedestrian street that runs west off the Mercat de Sant Antoni. The Calders family opened it in the early 2000s as a small interior bodega; today most of the action is the terrace — thirty-odd tables spilling across the pedestrian street, full from late morning at weekends and from 19:00 most weekdays. Time Out Barcelona lists Calders in nearly every vermut and terrace round-up it has run for a decade; The Guardian's Barcelona city guide called the street "the city's most concentrated aperitif strip" and named Calders as the anchor.
The right visitor wants a 12:30 vermut on the terrace with a plate of berberechos, watching the Sant Antoni Saturday market crowd; or a wine-led pre-dinner with neighbours. The wrong visitor wants a quiet drink, table service that responds quickly on a Saturday afternoon, or a craft cocktail programme. Bar Calders is loud, terrace-first and unapologetic about the wait.
The interior is a classic Sant Antoni bodega format — long bar, tiled walls, two wooden vermut barrels on the back wall, a few standing tables. The terrace is the show: thirty-plus chairs along Carrer del Parlament, with the pedestrian street between the Calders tables and the seating of neighbouring bars (Mitja Vida, Federal). El País described the strip as "the Sant Antoni rambla in everything but name"; the Calders block is the busiest stretch of it.
The default order is the house vermut blanco or rojo (around €3–4) on the terrace with a tin of berberechos or a plate of patatas bravas; that's what most of the room will be drinking from 12:30 to 15:00 at weekends. The wine list is short and Catalan-heavy — Penedès, Priorat, Empordà — by the glass from around €3.50; corkage is reasonable and the staff will recommend without upselling.
Gin tonics are the under-rated order at Calders; the bar pours a proper measure into a balloon glass with Fever-Tree or a similar tonic for €8–10. Regulars on r/Barcelona consistently put Calders in the top five Sant Antoni gin tonics; the bar's own Instagram leans into it. Skip the cocktail-list specials — the seasonal menu rotates but the regulars stick to the wine and vermut.
Saturday is the peak: from 12:00 the terrace fills with the Sant Antoni Saturday market crowd — families, couples in their 30s and 40s, dogs underfoot — and stays full until close to 16:00. Mid-week the room is mostly neighbourhood until about 21:00, when a slightly younger crowd from the Eixample and Poble-sec mixes in. Eater's Barcelona neighbourhood guide called the terrace "the closest Barcelona gets to a Sant Antoni village square".