This event provides us with some hints about her (well, actually Gregoire's) fan base and popularity. These people paid decent money to be a part of these workshops today, and it looks like the number of participants was limited to a nice comfy level. Looking around the room, a certain demographic seems to be well represented. I recognize a few of the fans as long-time Alizée fans, and quite a few people who are fans of the couple only since DALS. Then some seem to me to be more fans of Gregoire than Alizée. This isn't really based on today's photos and videos here on the forum, but through my observations of many of these people on the social networks over time.
It looks like it was great opportunity to get access to A&G though. Everyone got photos with them and some autographs. If I didn't think the activity would kill me, I'd consider trying to attend one of these workshops.