Well, you could either go to Carnaval this weekend -- or you could go to the State Green Party Convention. Ross Mirkarimi (seen here going into the dunk tank) is giving the keynote address, and the delegates plan to debate issues like ranked-choice voting, lowering the voting age to 17, and immigration. They may also get to issues about global warming. The convention starts at 11:30 a.m., goes through the Memorial Day weekend and is......