Toss a small (TM) on either Sponty, "be hangoutable", or both. TM means trademark - but anyone can use it whenever they're using new descriptive language that doesn't infringe on someone else's mark. You don't need to register anything - the (R) in a circle means Registered Trademark, and you need to register that.
Kellogg's has a registered trademark, they paid the USPTO (United States Patent and Trademark Office), and had a search done to make sure it didn't infringe on anyone. They have a very strong legal standing if anyone comes after them:
But look at Google - they just use (TM)!
TM adds a bit of credibility. Split test it if you're not convinced, but it shouldn't hurt, and makes you feel like a real company. I'd definitely throw the TM onto "be hangoutable", because that's a cool phrase, and I'd want to own that after coining it.