This weekend's music offerings are marked by the opening of a new art museum and performing arts space in Bentonville, some returning folk favorites to the area and a number of rock and roll shows . Wed, Feb 19 Ben Harris at Six-Twelve Coffeehouse (Fayetteville) - 6 p.m. Front Country at Guisinger Music House (Fayetteville) - $20, 7 p.m. Thu, Feb 20 Borgore at George's Majestic Lounge (Fayetteville) - $22 adv, $25 day of, 9 p.m. Garrett Brolund at Mickey Finn's (Fayetteville) - 7 p.m. Roger