I go at it alone and that's how I like it. I typically shoot for early on a Sunday morning well before the rest of the house is awake. I set up the night before so come morning, grab some coffee and start heating up the strike water. Brewing is my time, it's a time when I have to focus on nothing else but brewing, no distractions, no multi tasking. I keep things easy, but streamlined so I am constantly on the move once I am on to the boil. The only "chill" time is during the mash.
I used to have a brew night once in a while with a few buddies over but I quit doing that years ago. We would order a pizza, have some beers, drink too much, get to lax with the beer I was trying to make. It was fun here and there but I found that I couldn't fully enjoy myself either way. There's just too many things going on with the brew session to sit down and fully relax and enjoy the company nor did I feel like I am enjoying the brew session. I used to always feel rushed or distracted or worry I was forgetting something. On the flip side, if I had company that was truly interested in the brew session, it would probably be a lot easier to manage and it might be different but it's not usually the case. However I do have a friend that used to brew and wants to come over for a brew session soon and check out my new system. That I can probably handle and we will be good.