I'll preface my response with this; I'm not big on hard-and-fast rules, I prefer à la carte depending on the circumstances.
Just prior to my wife moving out, and during the first few days after she moved out, I thought maybe we'd (me, wife and sons) all have supper together on a fairly regular basis. We did see a fair amount of each other the first week after she moved out. But, as time went on, and I actually found myself enjoying the serenity of the absence of my wife (ouch!), it seemed like my comfort level for being around her had diminished. I'm okay with short intervals with my wife, but I really don't feel like having supper with her right now.
Please note, I didn't expect to feel that way. I'm not trying to go dark or do LRT or do double-secret-special-ninja LRT, I'm just doing what feels best for now, and as little contact as possible feels good right now. I guess I need to heal too.
So, my recommendation? Don't set a hard-and-fast path for yourself; see where things go and how you feel and decide what you think is best for you and your marriage.