I agree with what everyone said above: The clowns probably won't (or shouldn't) host in the corals you mentioned. (Although you can never be sure as clowns are strange fish and will host in many strange things, including powerheads, LPS, cleaner magnets and old mop heads. JK about the mop heads...)
But there are some tricks to help 'nature take its own course' a little quicker. You can shine a flashlight on the new (let's say) anemone at night, when all the other lights are off. It makes the anemone stand out like it's on stage, and timid clowns will often go check it out. This can lead to them hosting in it, assuming they're compatible species. It worked for my Two-band and the Sebae anemone.
I've also heard of people who tape a picture of a similar clownfish on the outside of the tank near the anemone. Supposedly, the clown sees the other clown's picture near the anemone and copies it. Hard to believe, lol, but have heard it really works.