I had gone to different groups in the past (including AA), but currently I'm solo other than coming here to SR. Having said that, I've had a complete lifestyle change in the past few years that I attribute to maintaining my sobriety. I met and married my wife is wholly supportive of my recovery and has also cut alcohol from her life (she's not an addict). Our house is alcohol free and we tell visiting guests ahead of time. I've distanced myself from people in my life for whom alcohol was a daily activity, and who also enabled me in my drinking (including some family).
For me, old environments fed my old habits, and I had to just completely remove myself. If and when I re-enter those environments (i.e. visiting family), I have a support system there with me.