The Opera Tattler

Whilst looking at tickets for Opéra national de Paris I learnt that they do have standing room, but only at Opéra Bastille. The official site of the opera says that the tickets go on sale when the doors open, approximately 90 minutes before curtain up. This seems rather vague, as it does not say where said tickets can be purchased.

The French language site was not much more help, reading: Les places de 9e catégorie (debout) sont vendues à l’ouverture des portes soit environ 1 heure 30 avant la représentation and Les places de 9e catégorie (debout) à l’Opéra Bastille sont vendues dès l'ouverture des portes, soit environ 1h30 avant le lever de rideau.

After a bit more research, I found that AP reported that 62 tickets go on sale from machines in the lobby, which helps a little bit but still leaves me with a lot of questions. One wonders when and where the queue forms. Any advice on this is welcome.