The Yonder Mountain String Band, a type of modern blue grass band, performs at Penn's Peak in Jim Thorpe. A large crowd attended the concert on Thursday. The band has several albums and has made numerous Penn's Peak appearances, playing music from several albums they've recorded. Two concerts are on tap for this week. On Thursday night, Sweet, which had a big hit with "Little Willie," will be on the stage at 8 p.m. On Friday night, it's Peter Noone and Herman's Hermits in concert.