9 7 9 ▁that ▁would ▁later ▁be ▁c ited ▁as ▁a ▁har b inger ▁for ▁the ▁genre ' s ▁popular ▁collapse ▁in ▁America ▁during ▁ 1 9 8 0 . ▁The ▁station ▁stayed ▁with ▁the ▁disco ▁cra ze ▁until ▁ 7 ▁a . m . ▁on ▁May ▁ 2 2 , ▁ 1 9 8 0 , ▁when , ▁after ▁st un ting ▁by ▁playing ▁Don na ▁Summer ' s ▁" Last ▁Dance " ▁on ▁a ▁loop , ▁ 9 4 . 7 ▁became ▁W R CK - FM , ▁" 9 5 ▁W - RO CK ", ▁an ▁Ad ult ▁Top ▁ 4 0 / Old ies ▁hy brid , ▁and ▁featured ▁Bob ▁S iro tt ▁in ▁m orn ings ▁for ▁a ▁brief ▁time . ▁The ▁ 1 9 7 8 ▁switch ▁to ▁disco ▁was ▁the ▁first ▁in ▁a ▁series ▁of ▁format ▁changes ▁that ▁continued ▁up ▁to ▁its ▁switch ▁to ▁classic ▁hits ▁in ▁October ▁ 2 0 1 2 . ▁ ▁In ▁December ▁ 1 9 8 0 , ▁W R CK - FM ▁switched ▁to ▁a ▁Top ▁ 4 0 ▁format ▁with ▁a ▁partial - sim ul cast ▁of ▁W LS ▁( AM ), ▁and ▁changed ▁its ▁call ▁sign ▁back ▁to ▁W LS - FM . ▁The ▁sim ul cast ▁included ▁Larry ▁Lu jack ▁during ▁the ▁morning ▁drive ▁and ▁Br ant ▁Miller ' s ▁evening ▁show ▁into ▁the ▁mid - 1 9 8 0 s , ▁while ▁air ing ▁its ▁own ▁programming ▁during ▁the ▁day . ▁W LS - FM ▁was