Shorty
Boomer Boy
Just designate Beijing, London, Tokyo, Paris, LA as "Olympic cities" and put those 5 on a rotation so they each host every 20 years. They will have hosted 5 of the 6 summer games 2008-2028 (all except Rio), they all have facilities and infrastructure already built (and to the extent their facilities need an update from games 20 years ago, they all have needs for facilities post-games so won't just be built and wasted), and they all have interest in hosting (or did at least once between 2008-2028).
But then how would IOC members milk prospective host cities for cash, cars, college scholarships, etc?