At the Brecon Jazz festival in 2008, Ernie's Rhythm Section, a Manchester blues band, were playing the old standards of Howlin' Wolf, Sonny Boy Williamson, John Lee Hooker, and so on. These are songs I can easily relate to. The Blues is rough, and ready for the street. Unfortunately in the intervening years, Brecon has sometimes banned music from the streets, greatly diminishing the musical flavours of the weekend.
It takes many years to become a proficient musician but no matter how accomplished, (as this man was) playing on the street is often the only opportunity for a migrant. Romanian folk tunes might stand out against local expectations in Swansea, but perhaps the influence could be a healthy one if the repertoire of Balkan melodies becomes more familiar over time.