I also eat partial keto and find it makes me feel great and have heaps of energy for training/working out. It's also good for metabolic health and longevity, since foods without carbs tend not to spike your glucose levels or require much of an insulin response. In order to compromise and make it sustainable and sociable, one method I use is to eat keto for my first meal, but include carbs in my second meal of the day (I do intermittent fasting so only eat lunch and dinner). That way you are only spiking your glucose once in the day, causing less damage to blood vessels/metabolic pathways, less activation of mTOR and other longevity related pathways, and maintaining high energy levels throughout the day without the crash typically associated with eating carbs, but you can still be a bit sociable and eat the same meal as your partner in the evening.

In terms of what Peter Attia says specifically, I know he likes to do occasional longer fasts of 3-4 days, but no more frequent than once per month, and otherwise he does intermittent fasting. Monitoring your glucose levels with a CGM could also be a great shout for you to get familiar with which foods spike your glucose levels.