Regina Spektor at Beacon Theatre Photo: Jon Klemm (more) Apr 23 Mon Washed OutBuy TicketsAmex presale begins:Wed, 03/28/1212:00 PM Music Hall of WilliamsburgBrooklyn, NY08:00 PM   Buy TicketsAmex presale begins:Wed, 03/28/1212:00 PM Apr 26 Thu GuardsBuy TicketsAmex presale begins:Wed, 03/28/1212:00 PM Mercury LoungeNew York, NY09:30 PM   Buy TicketsAmex presale begins:Wed, 03/28/1212:00 PM Apr 27…