Helgi's stands as a vital cultural anchor on Mare Street, a dedicated space for London's heavy music and alternative arts community. It provides a consistent platform for underground talent and a gathering point for enthusiasts, contributing significantly to the capital's diverse event landscape. This establishment is more than a commercial venture; it's a commitment to a specific subculture, offering a consistent home in an ever-changing city.

Inside, the atmosphere is immediately distinctive, steeped in an occult and psychedelic aesthetic. Dark, rich colours dominate, often bathed in a deep purple light that casts long shadows across the vintage black-light posters and intricate decor. The air often vibrates with the resonant thrum of heavy guitars or the deep grooves of vinyl, creating an immersive sensory experience that is both intense and welcoming.

The venue features a main bar area at the front, leading to a larger private back room, complete with its own bar, offering flexibility for various events. Patrons can explore a selection of beers, spirits, and notable house specials like the substantial gin schooner. The distinct separation of spaces allows for varied experiences within the same building.

Throughout the week, Helgi's hosts a dynamic programme. This includes regular live performances from rock, metal, and punk bands, alongside curated vinyl DJ nights. Beyond music, the space accommodates talks, film screenings, launch parties, and other creative endeavours, solidifying its reputation as a versatile hub for East London's artistic and musical fringes.