Bar A Bar is an underground nightclub situated in Stoke Newington, North London, United Kingdom, and has established itself as a distinctive fixture in the city's alternative nightlife scene. The venue operates out of a compact, basement space beneath a nondescript Turkish restaurant on Stoke Newington Road, giving it a raw, intimate atmosphere that stands in stark contrast to glitzier club environments elsewhere in London. Opened in the late 2000s, Bar A Bar quickly became known for its commitment to cutting-edge electronic music, offering a platform for experimental sounds, up-and-coming talent, and grassroots communities within dance music.

Its sound system, celebrated for its clarity and power relative to the venue's modest size, attracted discerning listeners and artists eager for an authentically immersive clubbing experience. Known for its DIY ethos and fiercely independent spirit, Bar A Bar grew out of and continues to support London's vibrant underground music culture. The venue's intimate setting and lack of flashy decor have allowed it to function as a creative incubator, especially for genres on the fringes such as UK bass, techno, garage, grime, jungle, and more experimental club sounds.

Due to this, it has built a reputation as an unpretentious, music-first club where both crowds and performers feel comfortable pushing boundaries. Unlike larger clubs, Bar A Bar has maintained a low-key yet vital community presence, and its resident nights and guest lineups have been instrumental in championing local talent as well as hosting secret sets and afterparties for internationally touring acts. Though the core location and structure have remained largely unchanged, the club's interior underwent subtle tweaks over the years to enhance sound quality and increase comfort for its diverse clientele.

Throughout its history, Bar A Bar has faced challenges common to grassroots venues—including threats of closure and pressures from gentrification—but has persisted, earning recognition for its role in sustaining London’s underground nightlife ecosystem. Its endurance is a testament to a loyal following and the dedication of the promoters who continue to curate its calendar. Notable artists who have performed at Bar A Bar include internationally respected figures such as Pearson Sound, Objekt, Helena Hauff, Ben UFO, and Batu, as well as homegrown talents like L U C Y, Parris, Beneath, and the founders of the influential Night Slugs and Nervous Horizon labels.

Local collectives like Eastern Margins and Tobago Tracks have also made Bar A Bar their temporary home for special events, while emergent DJs and producers from London's vibrant scenes—often before breaking out to larger audiences—have used its dancefloor as a proving ground. This blend of global guest selectors and grassroots residents continues to fuel Bar A Bar’s reputation as a crucible for forward-thinking club music in the UK capital.