I use the local library for this. There are some really nice libraries where I live (in Chicago) and they are generally quiet, except for the few that have a kids' area that isn't sufficiently isolated.

I know in some countries there are dedicated study spaces which you can pay to access. That would indeed be nice. Co-working spaces could have served this role except many play up the social aspects and have open office configurations. They do have private office spaces but they are expensive.