We suspended the game to walk 10 minutes to the Église Notre-Dame de la Croix de Ménilmontant to attend the 11:00 p.m. Veillée de Noël service. The church is large, beautiful, and felt very much like a local parish (we had considered going to the other Notre Dame, but thought it might feel a bit too touristy).
The Veillée service consisted mainly of organ music, singing, and readings. We all liked it when the organist pumped up the bass, and didn't really like it when the song leader sang out of our range.
We left just in time to see the start of the midnight mass. It was cold, we're not Catholic, and hey, we had a Monopoly game to finish! Merry Christmas Eve!