Tango in Buenos Aires
Love the couple in the second shot. The gentleman is perfect.
Are these people doing it as a show for tourists ?
As for the semi-sepia, I think it is OK. They would be a bit dark for a print.
For realistic sepia, convert to black-and-white and use Duotones in Photoshop. The second colour wants to be a russet brown. Set the curves so that there is more black in the shadows and more colour in the highlights.
You can do any colour of toning in Duotones.