“Fireside Sessions: Nancy Atlas and Friends” returns for cozy concerts at Bay Street Theater every Saturday this month (January 7-28). Southampton Cultural Center presents Neil Simon’s comedy and first Broadway hit “Come Blow Your Horn” (Friday-Sunday, January 20-29). No wallflowers are allowed at LayeRhythm dance troupe’s interactive dance session (The Church, January 14). 1 Bay Street, Sag Harbor, N.Y., 11963. 25 Pond Lane, Southampton, N.Y., 11968. 48 Madison Street, Sag Harbor, N.Y., 11963.
