Cregg Castle, nestled near Corrandulla just outside Galway city in the west of Ireland, is famed for its storied history and unexpected role in the Irish nightlife scene. Originally constructed in the late 17th century, the castle was once a classic example of an Irish country house, known for its stately architecture and prestige. For many years, it served as a family residence, changing hands several times and undergoing renovations that preserved its historic stonework while subtly introducing modern amenities.

In the 1990s, Cregg Castle began a dramatic transformation: its formidable halls and lush grounds briefly opened up to host a series of legendary nightclub events, earning the site a cult status among electronic music aficionados and partygoers across Ireland. This period coincided with a broader cultural wave that saw unconventional venues—such as castles and repurposed rural estates—become sites for raves and dance music events, offering revellers a unique blend of old-world atmosphere and contemporary sound. The reputation of Cregg Castle as a nightlife venue quickly grew, with stories of vibrant parties under vaulted ceilings spreading by word of mouth and through local media.

The castle's remote location outside Galway contributed to its elusive underground allure, attracting crowds eager for a novel clubbing experience away from city nightlife norms. Over time, and following regulatory pressures and concerns around hosting large events in such a historical and rural setting, nightclub events at the castle became more sporadic, and eventually ceased, though the venue has occasionally been revived for special one-off occasions and private gatherings. Despite its relatively brief period as a functioning nightclub, Cregg Castle occupies a significant place in Irish cultural memory, representing a unique era when the boundaries between music, history, and space were creatively reimagined.

Notable artists who performed at Cregg Castle during its time as a nightclub include both renowned international acts as well as beloved local talents. These have included international DJs such as Sven Väth, Laurent Garnier, and Lisa Lashes, along with celebrated Irish artists like Fish Go Deep, Mark Kavanagh, and Greg Dowling, drawing diverse crowds from across the country and further afield, and contributing to the lasting legend of Cregg Castle in Ireland's vibrant musical history.