Dirty Beaches at SXSW 2011 (03/19/11) Photo: D. Caplan Apr 25 Eliza Doolittle Mercury LoungeNew York, NY06:30 PM Buy TicketsAmex presale begins:Wed, 03/30/1112:00 PM May 4 Gang Gang Dance Music Hall of WilliamsburgBrooklyn, NY08:00 PM Buy TicketsAmex presale begins:Wed, 03/30/1112:00 PM May 6 Kittens Ablaze Mercury LoungeNew York, NY07:00 PM Buy TicketsAmex presale begins:Wed, 03/30/1112:00…