You don't want pure Sativas.
Look for low THC / high CBD strains.
I'd suggest coffee shop Siberie would be a good place to start.
They list THC% & CBD% on their menu.
No idea how accurate these measures are, but worth using as a comparative guide.
Also, DO talk to the bud tender.
http://www.coffeeshopmenus.org/Siberie/Menus/Siberie.htmlIgnore the first menu here it's for Best Friends CS. I don't know what that's about.
....and if you are going to chop up some of the girls, make sure it's the OZA rip off merchants. (8~>)