Mumford & Sons at the Mercury Lounge (10/21/09) Photo: Jon Klemm (more) Feb 6   Mumford & Sons Barclays CenterBrooklyn, NY08:30 PM Buy TicketsArtist presale begins:Wed, 11/07/123:00 PM Nov 27   Colin Mcshane / Dr. No / Sprocket / Ryan DardenBuy TicketsAmex presale begins:Wed, 11/07/1212:00 PM Mercury LoungeNew York, NY08:30 PM Buy TicketsAmex presale begins:Wed,…