Meditation in Somerville/Cambridge?

Would anyone know of a good meditation class/group in the general CamberVille area that offers evening or weekend sits? I no longer have one to go to and I miss it. Last week I tried the Insight Center of Cambridge, but to be honest I found it rather sterilized and stiff and didn't feel good about it. I'm hoping to find something with a more focused spiritual lean, rather than just stress decompression. It's all right if there's a fee.

Any suggestions and leads are greatly appreciated. :-)

cross-posted