The Rabbinical Council of America and Yeshiva University were critical of Rabbi Jonathan Rosenblatt’s practice of mentoring boys and young men in extended mutually nude interactions in showers and saunas. However, the Orthodox Union (OU) used Rosenblatt for rabbinic mentoring events starting in 2009 and 2010. These events ran through 2013 but it is not clear if he was used for all of the remaining events, though the OU did not claim otherwise when I inquired.
According to a 2010 email by OU Executive Vice President Rabbi Steven Weil,
In Toronto I attended a three-day conference for over 30 rabbis from large, medium and small shuls across North America. This is part of a regular series of gatherings organized by the OU, which occur on-site in numerous locations; last year, the rabbis met in Chicago, while next year’s conclave is planned IY”H for Kansas City.
Many of the rabbis who participate in this group are relatively new to the pulpit (within the past decade, but most newer). They are mentored by more experienced rabbis, foremost among them Rabbi Jonathan Rosenblatt of the Riverdale Jewish Center. This event was held at Shaarei Shomayim, following which, I was privileged to remain behind in order to serve as Shabbat scholar-in-residence. (emphasis added).