We may be in the dog days of summer, but there are ample opportunities for live music this weekend, taking place both indoors and outside. Thr, Aug 19 Jeremiah Griffith at Six-Twelve Coffeehouse (Fayetteville) - 7 p.m. Asher Perkins and Friends at Walmart Museum (Bentonville) - 5 p.m. Open Bluegrass Jam at Chelsea's (Eureka Springs) - 8 p.m. Charley Crockett at Majestic (Fort Smith) - $25.00, 8 p.m. Fri, Aug 20 Honeyjack at George's Majestic Lounge (Fayetteville) - $8.00, 6 p.m. Funk Factory at