It has been reported that 40 major seminarians from the Mundelein Seminary - that is the seminary of the Archdiocese of Chicago, although it also serves other dioceses - will be attending a Solemn High Mass on 19th January at the Church of St Odilo in Berwin, which I believe is a district of Chicago. This church has a regular Sunday Mass in the usus antiquior, and apparently an accomplished choir. On this occasion, they will be singing Palistrina's Missa Aeterna Christi Munera.
According to their website, the Mundelein Seminary, also known as the University of St Mary of the Lake, has about 190 students studying for the priesthood, so I would presume that "40 major seminarians" represents most, if not all, of the seminarians in their final years. It would certainly seem that this visit to the church of St Odilo has some official backing from the seminary authorities.
Again, I am not sure whether instruction in the celebration of Mass in the usus antiquior is included in the seminary curriculum, but it certainly seems to be the case that Mundelein students do have the opportunity to experience the usus antiquior in its most impressive form. This is in stark contrast to the practice in the seminaries of England and Wales, where students are kept far away from the traditional Mass.