BS”D
Chabad chassidim do not take haircuts on Lag beOimer but we do listen to music – in fact we have big parades and public programs as per the Rebbe ZYA’s instructions. Eve of Lag beOimer – I think we do listen but I am really not sure. I tend to be too busy to care :). We most certainly listen to music on Chol HaMoied Pesach. We do take haircuts and listen to music during the shloisha ymei hagbolo before Shavuos and we have weddings on those days as well (just as we do on Lag beOimer). I think all Chassidim who “keep all 49 days” have similar minhagim.
Creedmoor is the exception. In Creedmoor, they count “bein hametzorim” – from Yom haAtzamois on 5 Iyar to Tisha be’Av. Instead of the 10 sefiros they use the Arba Misois Beis Din and other punishments to name the days. So, Yom haAtzamois is skila shebeskila and 9 Av is malkois shebemalkois or knas shebeknas (I forget which). [EDIT – it is actually Kooreys shebeKooreys and it is celebrated by schechting and grilling rubber duckies as a seudas hamafsekes.)