In our Confessional Room there is a chair behind the screen if the Penitent wants to sit, as well as a chair facing the Priest's chair if you prefer face to face confession.
Lately, when our Parish has had Penance Services before Christmas and Easter, the Parish brings in several Priests from neighboring towns, and the Priests station themselves at the 'corners' of the Sanctuary and Altar. Folks go to the Priest and sit in a chair facing him. The conversation is low, so no one else hears. It has worked out well for our Parish. There is never an overly huge crowd, but all those who want to receive the Sacrament are able to do so. There are Scripture readings and songs as well, so it is a Prayer Service with the availability of receiving the Sacramement.