The thing about bikes, is sometimes you aren’t riding them. Feedback Sports had a pretty slick option at Interbike this year- one that might cost a little more than a $2 hook, but it looks a lot better, and allows for closer packing of bikes- you might be able to fit 6 in the space that you could fit 5 before. Turning your wall into something like a poster display rack at Walmart- but in a good way.
I’m not certain the max tire width that’ll fit, but for most bikes out there, It’ll be just fine. $24.99 and it’s yours.
Those folks at Feedback sure do have some thinkers on staff. Keep it up!