It's not our place to comment on the lucky position you're in OP, and it's clear you're very aware of it.
As a previous poster said, what your "luxury" outgoings are is going to depend a lot on where you are in the country.
You're earning pretty well for someone of your age. Does that mean that there are certain obligations on you to look a certain way at work? So manicures, good haircuts and regular clothing purchases might only be semi-optional for you. If so, I would separate that out.
As for socialising, work out what you're currently spending. Roughly. In your position I would try and work out what you need to do what you enjoy, within reason and give it to myself as an allowance each month. I'd keep it separately, probably in a different bank account. Once it's gone, it's gone, and anything you don't spend by payday you transfer into savings. Because at that point you get a new "allowance".
This has the added benefit of making you more aware of what you're spending.
It's ok to be comfortable and have fun. Especially in your 20s. It's also sensible to remember that it might not be like this forever. Though actually, for quite a lot of people it is.
I had spending power in my 20s that I don't have now. I'm glad I enjoyed it then, as I don't expect to get the chance again and it helped me to maintain friendships that I couldn't put a price on.