The Alwars (also spelled Azhwars) are a group of 12 ancient Vaishnava saints who lived in Tamil Nadu and are famous for their poetry in praise of Vishnu. The Alwars are crucially important figures in the development of Vaishnavism; it is the principles and beliefs embodied in the Alwars' poems that ultimately gave rise to the Sri Vaishnava sect (of which I'm a member). The Alwars praised many Vishnu temples and other sacred places of Vishnu in their poetry; a sacred place of Vishnu that was praised by at least one Alwar is called a Divya Desam, and there are 108 of them; see the list here.
Now because of the important role that the Alwars' poetry played in the development of the Sri Vaishnava sect, Sri Vaishnavas naturally tried to build temples in the sites of any Divya Desams that didn't already have Vishnu temples, and the advent of the Sri Vaishnava sect led many existing Vishnu temples to convert to Sri Vaishnavism in their rituals and practices. So my question is, out of the 108 Divya Desams, how many of them are the site of a Sri Vaishnava temple?
Now two of the Divya Desams aren't even located on earth, Vishnu's ocean of milk and Vishnu's palace of Paramapadam. It's probably best to avoid speculation here about what customs are used to worship Vishnu there, so I'm just asking about the 106 Divya Desams on Earth! I expect some Divya Desams in North India (of which there aren't that many) don't have Sri Vaishnava temples, only because Sri Vaishnavism is more popular in South India. But are there any South Indian Divya Desams whose Vishnu temples follow other sects other than Sri Vaishnavism, like Gaudiya Vaishnavism and the like?