Welcome for me to blogging! Care for spanish classes? :)

Well, so I'm starting this blog with this lurking voices inside my head about teaching in spanish at MA.
I long to have a coupleof groups hosted in spanish but... what's the best time to attend the most spanish speakers in different time zones?
Mexico for instance ranges from -1 to +3 hours from SLT. If we move to south america we can get up to +6 from SLT. And Spain is +10 from SLT. What should be the best timing for spanish groups and classes?
I would love to hear of specific cases, so I can make a grid (AND agree computer time with the rest of the family, hehehe..) Anyone cares to attend spanish groups & classes?