Green, outdoor space included
Gardens and outdoor areas to breathe between two sessions.

Comet · Nanterre
Comet Arboretum in Nanterre: green, open spaces for up to 450+ participants, 15 minutes from Paris on the RER A.
The change of scene of a countryside off-site, without the two-hour coach ride.
Since 2016, more than a million participants welcomed. Comet is a certified B Corp company.
Green, outdoor space included
Gardens and outdoor areas to breathe between two sessions.
Up to 450+ participants
PI plannings, conventions, large-format off-sites.
15 minutes from Paris
Direct RER A — your teams arrive without a coach or a hotel.
A chef's table
Summer barbecues, seated lunches, generous breaks.
By RER A (Nanterre), around 15 minutes from central Paris. Access and parking are detailed on the venue page.

Tell us about your event and receive an all-inclusive proposal in under 24 hours.
Or come and visit the Arboretum: it speaks for itself.
Comet Arboretum sits in Nanterre, inside the park of the same name, on the banks of the Seine. It is the address to remember when you want the change of scene of a countryside off-site without imposing a two-hour coach ride on your teams: people arrive in the morning, spend as much of the day outside as inside, and go home in the evening.
The RER A reaches Nanterre in about fifteen minutes from central Paris, and puts the venue a few stops from La Défense. For participants coming from the west and the inner suburbs, road access via the A86 avoids crossing the capital altogether. That is often the point that decides between Nanterre and an address inside Paris when your teams are not all starting from the same place.
Annual off-site, convention, launch day, team building, summer party: the formats that gain from leaving the office are the ones that alternate sitting and standing. A plenary in the morning, breakout workshops in the afternoon, a break or a lunch outside in between. The grounds are not scenery: they are part of how the day is built.
The principle is the same across every Comet venue: the room, the technical equipment, the catering and the on-site team are included, and you have a single point of contact from quote to event day. You are not coordinating a caterer, an AV supplier and a site manager separately — which is precisely what separates an operator from a bare room rental.
Comet Cœur Défense, at the foot of the La Défense esplanade, takes over for more urban formats and short meetings. Comet Levallois, in its château, suits committees and client events. Comet Ternes and Comet Étoile extend the offer towards the Champs-Élysées. A single quote can move from one venue to another within the network if your project changes scale.
Before you choose, look at what the people who ran their events there have to say. Comet venues hold an overall rating of 4.7/5 on Google and a client satisfaction score of 99.5/100, measured across more than 2,500 respondents, on the three criteria that make a day work: welcome, catering and technical reliability. Comet is also a certified B Corp company.
Tuesday-to-Thursday slots and off-site season go first, and the outdoor spaces concentrate demand from spring to autumn. Describe your project in two minutes: you receive an all-inclusive quote within 24 working hours, and you can visit before confirming.