Tinder has another horrible UI trick, not sure if it qualifies as dark pattern or just terrible coding. On Android, they require you to enable the global option "Always allow Wifi scanning" in order to get your location. If this is disabled, they pop up a dialog saying "Enable? Yes | Cancel". Hitting "Cancel" immediately pops the dialog back up again, so you cannot use the app at all until you click "Yes".

edit: Some of us do not want to enable this power-draining, privacy-sucking global option just to use Tinder. An xposed framework module was created to bypass the check, but Tinder has actually begun checking for it and the app doesn't work properly if it is enabled.