Aviary - Glass Box

The Glass Box is a semi-private event space situated on the 10th floor of Aviary at Montcalm Royal London House on Finsbury Square. Surrounded by floor-to-ceiling windows, the space frames unobstructed views of the open terrace and the City of London skyline, creating a bright and visually impressive setting that feels entirely removed from the streets below. Accommodating up to 50 guests standing, the Glass Box is ideally suited to drinks and canapé receptions, small corporate gatherings, engagement parties, and intimate celebrations. During the summer months, double doors open directly onto the Aviary terrace, allowing guests to flow freely between the indoor space and the open-air setting. The terrace remains accessible to all guests year-round until 10 pm, though it is unsheltered, so it works best as a warm-weather addition. Catering is provided entirely in-house, with a menu spanning modern British cuisine and an extensive vegan offering. The full drinks service includes Aviary’s well-regarded cocktail menu, an alcohol licence until midnight with extensions available, and no BYO alcohol is permitted. Wi-Fi is available throughout.