La Seine Musicale, on Île Seguin in Boulogne-Billancourt, hosts conventions, general assemblies, product launches, awards and forums for up to 10,000 people. The venue sells three event formats built around its two main halls, the Auditorium and La Grande Seine, and a full-site privatization for the largest projects. It is a performing arts venue first, so event dates are arranged around its concert season.
Seminars and company events
The official business offer is named Seminars and conventions, and it is aimed at large events. The operator describes capacities and modularity that leave room for custom layouts and technical setups. Past events listed on the page include a film preview, a nuclear industry summit and an event called Positiv Planet, which gives an idea of the scale handled here. A dedicated corporate events contact handles requests.
Weddings and receptions
The business pages do not offer weddings or private celebrations. The venue sells corporate and institutional events, so couples looking for a wedding venue should look elsewhere.
Rooms and capacities
The Auditorium is fully equipped and seats up to 800 people facing the stage, or 1,150 in a 360-degree layout. It is offered for bookings of 400 to 1,150 guests, with the outdoor foyers on several levels as reception areas, and it can be combined with additional reception spaces.
La Grande Seine is the congress hall. Its stage is fully modular, and it holds up to 4,000 people in plenary format and 7,300 in a mixed seated and standing layout, for presentations such as product launches. It is paired with the Entreprises spaces and the Grand Foyer for lunch or a cocktail, and this combination is offered for 1,150 to 1,500 guests.
The third format is the full privatization of the site, with all reception spaces at the organiser's disposal (boxes, lounges and the Auditorium among them), for 1,500 to 4,000 guests. The site also lists a garden, the SeineLab and the Petite Seine among its spaces, though the business page does not give capacities for them.
Catering
Lunches and cocktails in the reception areas are prepared by the venue's exclusive caterer, Lenôtre. Organisers cannot bring their own caterer for these formats.
History and setting
The venue sits on Île Seguin, an island in the Seine in the Hauts-de-Seine department, west of Paris. It operates as a cultural venue with a seasonal program of concerts, musicals, dance and classical music, which is part of its draw for guests who attend a convention here.
Getting there
The address is Île Seguin, 92100 Boulogne-Billancourt. The official page on getting there was not available in the material reviewed, so check the venue's access page and arrival options before sending guest instructions. Security checks are in force at the entrance to the halls on show days.





