can someone please tell me the secret for the la la land scenario I have pretty much flew through the game but nothing seems to please the last two vips clint bushton and joe sluggerball any help would be very appreciated.

I am having the exact same problem! I have completed all the other scenarios (all apart from the last which is locked until I complete La La land!) and have been stuck on this for ages!

I have managed to please Clint Bushton (who wants to visit a Sci Fi area) by fencing off an area of my park and adding only Sci Fi themed rides, scenery, benches etc. and making sure the only entertainer that is zoned there is an alien. I have tried the same thing with adventure stuff but Joe Sluggerball just isn't pleased!!! Has anyone managed to complete this scenario?

I made some kind of palacewith the path going through it..
as soon as he entered the palace he was satisfied...
probably because it involves several walls, roofs, etc.

I got stuck on that scenario aswell. Basically just place lots of sci-fi rides and that pleases them.