They were invited to play several shows with Dara Puspita - an all female Indonesian rock band that were totally ground breaking back then, and are still incredibly popular to this day. (check out their amazing facebook page here: https://www.facebook.com/pages/DARA-PUSPITA/264099200376223?fref=ts )
The two groups also did a photo shoot for the December 1967 issue of Majalah Filem (see photo below).
Unsurprisingly, several of the members of the Rythmn Boys fell "head over heels" in love with members of Dara Puspita.
Ali Taib told me that, even many years later, at least one of the Rythmn Boys band members still wrote letters to one of the members of Dara Puspita...
I would love to see the remaining members of these two groups get together again to play some music.