After WTKK dropped its talk format there was a "wheel of formats" rolled out in successive days as a stunt. One was called Power, though I can't remember if it was classic rock or R&B etc.
(One may have been a "Mike" like variety hits format)
The Irish Channel was indeed a jukebox and had stuff like The Corrs, The Cranberries, U2, Van Morrison, Waterboys (a couple albums were like Irish folk), maybe some sentimental ballads
etc. I think WROL and/or WNTN have some Irish music shows on. A couple times a friend in Ohio sent me the Irish show from WAPS--Akron Public Schools and it also had a blend of
Irish music.
Let's see...WROL 950/100.3 "Irish Hit Parade"
https://www.facebook.com/WROLIRISH/
WNTN 1550 "Celtic Air"
http://www.wntn.com/programs/celticair.html
WUMB and WGBH also have Irish/Celtic music shows.
Wikipedia entry on WRCA 1330:
>>Following Beasley's acquisition of Greater Media, WRCA went dark on November 15, 2016, as it moved to new studios; it returned in May 2017 with a simulcast of "Boston's Irish Channel", the HD2 channel of sister station WBQT, as it was believed that WRCA was in the process of signal testing. The station was also paired with an FM translator, W291CZ (licensed to Boston) at 106.1 MHz. On July 3, 2017, Bloomberg L.P. and Beasley announced that WRCA/W291CZ would begin carrying Bloomberg Radio programming (which moved over from WXKS) beginning the following day.