Workshop Cafe in SF does it by the hour, seems to work pretty well. You get 10 hours free to start, it's worth your time to stop by for those hours at least.
But it's totally awesome to have the capability to check out who's there. I hope it goes a long way toward fostering a community there and helping people make useful contacts.
You can currently use the app on your desktop browser using the same url (https://app.workshopcafe.com) and get the same feature set as you get on your phone (Except for things that require a phone like calling or texting in orders). No need to switch from your laptop!
If you or anyone else reading this stops by you'll probably see me on the Community Page (under the name "Newton") as I'm in the café often. You can see where I'm sitting so you can come introduce yourself!