It's been a few months (and days), but I'm still thinking carnival. It's a good cross between a circus and a mall, with the bonus of activities to goof around with.
If that's the case, I'm going to all 3. First the Roman circus to the left. Next, Mardi Gras in Rio de Janeiro. Then one of those massive middle Eastern malls like the one in Dubai or Iran. After a week or so of exploring all that, I'll head back behind me to my mansion to play with all my souvenirs.
I'd retreat as option number one simply because I don't like crowds. If that's not an option, I'd chose based on the food and drinks available. So - either the carnival or the mall, but probably the mall.