Oury grips + Nashbar moustache bar. I tried just shoving 'em on, they slide right off. Hairspray (with 24 hours to dry), same thing. Soap, a little better but still slid off after a day. Just tried super glue, and they stuck, until I put any sort of force on them and then they slide around again.
Two sided tape? I've got some gorilla glue, but I think it'll turn out the same as the super glue.