Galician Folk Meets Heavy Bass: Fillas de Cassandra at Romaeuropa 2026

By Alyssa | WhatsOn music and nightlife writer Alyssa tracks the gigs, festivals, club nights and late-late plans worth leaving the house for.

The bass hits you before you even cross the threshold of the Mattatoio. This sprawling, industrial complex in the heart of Testaccio—once Rome's central slaughterhouse—now vibrates with a distinctly different kind of raw energy. Inside, the cavernous space is thick with anticipation, the air humming with the low-end frequencies of drum machines warming up, cut suddenly by the sharp, acoustic crack of a traditional tambourine. This is the exact kind of high-contrast, genre-warping collision that gets you out of the house on a Tuesday night in autumn.

On 22 September, the prestigious Romaeuropa Festival 2026 brings the unstoppable Galician duo Fillas de Cassandra to the capital for their highly anticipated Tertúlia Live show. Programmed as part of the festival's cutting-edge 'Ultra Club' series, this gig is a massive deal for Rome's alternative music scene. Fillas de Cassandra have been tearing up the European festival circuit by violently and beautifully crashing traditional Iberian polyphony into contemporary club electronics. If you are exhausted by formulaic four-to-the-floor techno and want to see boundary-pushing live music that actually makes you sweat, this is the undisputed anchor of your September calendar.

Synths, Tambourines and Sub-Bass

Forget standing still with a polite pint. A Fillas de Cassandra live set is an intensely physical experience. The room is swallowed by soaring, interwoven vocal harmonies that sound centuries old, only to be abruptly hijacked by relentless, modern synthesiser lines and earth-shaking sub-bass. It feels less like a standard concert and more like a theatrical, feminist rave.

The duo commands the stage with an infectious, untamed energy, effortlessly switching between haunting, acoustic moments of stripped-back percussion and full-throttle electronic crescendos. The stark, iron-and-brick architecture of the Mattatoio acts as the perfect brutalist backdrop to their sound—the heavy industrial beams catching the frantic strobe lights as the traditional Galician rhythms morph into frantic, club-ready beats.

The Ultra Club Crowd

The 'Ultra Club' programming always draws Rome's best and most musically literate crowd, and tonight will be no exception. Expect a heavy mix of local club kids, expat music nerds, and Testaccio's creative class, all united by a craving for something far outside the mainstream loop. The energy in the room is fiercely communal and deeply curious.

There is a specific electricity that ripples through a crowd when they are witnessing an international breakout act in a comparatively intimate space. You can feel the collective buy-in as the audience surrenders to the unfamiliar rhythms, ditching the usual gig-chatter to physically lock into the groove. By the final third of the set, the barrier between the performers and the floor completely dissolves into a unified, pulsing mass.

Know Before You Go

• Booking pressure: The Romaeuropa 'Ultra Club' gigs have a habit of selling out well in advance. Secure your spot or look into the festival's Passepartout packages via the official Romaeuropa Festival website before they are gone.
• Arrive early: Doors open well before the 21:00 start time. The queue outside the Mattatoio can move slowly, so get there early and grab a drink from the courtyard bar while soaking up the pre-gig buzz.
• Getting there: The venue is incredibly well-connected. Take the Metro B to Piramide or hop on the tram 3 directly into Testaccio. Parking in the area is notoriously brutal, so public transport or a taxi is your best bet.
• Dress to sweat: The industrial space holds the heat once the crowd gets moving. Ditch the heavy layers in the cloakroom and dress for a club environment.

Make a Weekend of It

If you are plotting out the perfect pre-gig run, Testaccio and neighbouring Trastevere have you covered. Just a short hop across the river, you can fuel up for a long night of dancing at Rione 13 Ristorante. It is a brilliant spot for an early dinner with exceptional, warm service that sets exactly the right tone for the evening. If you're craving something quicker before jumping on the Metro, grabbing a gourmet stuffed roll from Zia Rosetta in Monti is an excellent choice.

If you prefer a livelier, acoustic vibe to kick off your afternoon, secure a patio table at Tonnarello for casual, top-tier Roman carbs and meatballs before you walk over to the venue. Perhaps you want to sip a refined pre-show drink? Stop by Vattani Elegant Italian Restaurant & Cocktail Bar to enjoy a masterfully crafted cocktail before embracing the heavy bass at the Mattatoio. Looking for a base of operations or a glamorous spot for next-day recovery drinks? Book a room or a rooftop table at the Royal Art Cafè; the sleek, upscale interiors and direct Colosseum views offer a sharp, luxurious contrast to the underground grit of the night before.

See you by the speakers, Alyssa.