Any dating sites like plenty of fish
Then, if you change your mind, you won't have to rejoin and recreate your profile.
You can see this option also on the Help page in the left-side column. They tell you to go to Edit Profile and click on "To hide your profile from others, click here." When you later want to appear in search results, you can use Edit Profile to unhide your profile from others.
Well, so if you forget your password it is way more likely that you will not log back in a website.
If you just aren't pleased with Plenty of Fish, know that online services continuously change.