I think it depends on the couple because when you are committed to someone it should be a give and take type relationship. Being committed to someone does not mean that you have change your habits but both should make an effort to prioritize each other.

The what you called "pre-marriage habits" can still be retained but I think that the frequency should be minimized. The couple should have a heart-to-heart talk regarding this so that one will not feel left out.

When I got married, my husband did not forbid me to see my friends and I don't forbid him to see his close friends too. But I have learned to minimize seeing them because I have a family to attend to and they understand my situation. So we usually see each other during special occasions or when something came up and they want to celebrate. That kind of arrangement works for us because my husband can see that I am making an effort to prioritize him over my friends and that's what he do too.

If we have planned an important activity together and some of his friends happen to call, he declines and I feel that I am his priority. If they have a schedule of hanging out together I allow him because I know that it will also help him to unwind.

Being sensitive to each others need rather than your own can really help a lot. And you won't feel that you are being imprisoned or won't feel any grudge that you are not given the freedom from things you used to do before the marriage.