OAS without US. An Alternative http://www.tiwy.com/news.phtml?id=156

But many Latin American leaders see prospects for this kind of “co-existence” quite differently. The “populists” are determined that all future community members should pull out of the OAS. The “populists” see the OAS as a “punitive agency” that the United States has used all along to neutralize any “potentially dangerous” opponents in the region. The OAS has more than once covered up the US aggressive action. Suffice it to recall Guatemala (1954), Panama (1964, 1991), the Dominican Republic (1965), Grenada (1985), Haiti (1994) etc. 

It is under the flag of the OAS that the United States has been waging a struggle against socialist Cuba for over half a century now. Back in 1964 the Organization of American States bowed to the US pressure and took the decision that the OAS member-states should sever relations with Cuba. Although an overwhelming majority of these countries have since brought their relations with Havana back to normal, Washington’s dominant attitude whereby a return of “Castro’s dictatorial regime” to the OAS is inadmissible, is still there. This has largely prompted the idea of creating an “alternative OAS without the US” in Latin America, with the Rio Group already playing the role to a degree.