I do have an altar but it’s not a worshiping at altar, more somewhere I leave some of the objects and tools that are important to me. At the moment on my altar are; a Cambodian Buddha, a Tibetan Prayer Wheel, some stones (earth), feathers including a condor and an eagle feather (tools but also air), shells (water), a tea light (fire) fetishes of a sun and a condor gifted me in Bolivia and a key.
As someone who is probably best described as a shamanic pagan I don’t workship gods or goddesses and so have no need of an altar or shrine dedicated to anyone. My belief is that everything that exists has a spirit and so I connect with the spirit of whatever or whoever I am working with, usually in non ordinary reality, but sometimes in this one.
I do though use sacred space to work in if I feel it is needed but again this isn’t a fixed ritual as I also believe that we carry sacred space within us and so wherever I am working is sacred space.
On my website is an article about sacred space but to save you having to go and find it if you follow this link it will take you straight there: Sacred Space