For Granite Falls I built a restaurant.
https://78.media.tumblr.com/de98516bfd47ecd2a01aff68cd5841d8/tumblr_p9p2t68lcL1v8k7elo1_1280.jpg
https://78.media.tumblr.com/07864c603eadfc86832e05ea38401aea/tumblr_p9p3gqDzGE1v8k7elo6_1280.jpg
https://78.media.tumblr.com/185a2991e1c5c01aed56abfc735e866f/tumblr_p9p3gqDzGE1v8k7elo8_1280.jpg
More info in my showcase thread
here.
I did rebuild Selvadorada completely, but didn't change any lot types. But the bar is pretty multifunctional, so it could probably be changed into a different lot type.
https://66.media.tumblr.com/0d74364368057050d97b3da0b816ce4a/tumblr_pn2vf6aUFd1v8k7elo1_1280.jpg
I have a thread with more info
here.
As for your question for what to do with the museum - maybe a spa? So your less adventurous Sims have something relaxing to do.
