Dec. 25 Banjo Loco w/ Reggaejunkiejew, The Beat Seakers, MC Gringo and Eastern Turkish Waiting Room, 6212 Maple St. 8 p.m., $8, waitingroomlounge.com Everyone loves Christmas and one the best parts about receiving gifts that you worked so hard all year to earn is getting to show them off to friends. This year you don’t have to wait until New Years Eve. Christmas night, at The Waiting Room, the local heavy metal bluegrass act Banjo Loco will be hosting a night of music with friends Reggaejunkiejew, The Beat Seakers, MC Gringo and Eastern Turkish. “Heavy metal bluegrass?” you ask. “Is that even possible?” With a name like Banjo Loco, the answer is an emphatic yes. They cover songs ranging from The Beatles, Led Zeppelin, Maiden and Zappa all on their banjos. If you don’t believe me check out their rendition of The Beatles’ “I am the Walrus” at youtube.com/watch?v=QyBY0p9IE4.