Ron Bergeron will be starting the weekend off this Friday at Pedro O’Hara’s., from 8 to 11 p.m. Bergeron’s been playing guitar for over 20 years and singing for even longer. Taking requests from a wide variety of songs including quiet, sentimental pop ballads to high-energy rock anthems, country, blues and American standards.  On Saturday,  Skosh,  a five-piece jam-rock-alternative country band from Buckfield, will perform from 8 to 12 p.m.  The band has been described by The Portland Press Herald as playing, ”Phish-inspired tunes laced with the eclecticism that made rockers famous in the 1990s.” Pedro’s is at 34 Main St., Lewiston.