You can take the biologist out of the tropics, but you can't take the tropics out of the biologist. A number of tropical plants actually thrive living out of doors during our generally hot, humid midwestern summers until early fall, hung from shepard's hooks in semi-shade or convenient oak limbs. Once the temperatures begin falling below 50F, they get moved inside for the duration of fall and winter. The interesting thing is that this move stimulates regular flowering from December to February, a great indoor display of botanical color. Here's one of the Phactor's long time favorites: Billbergia nutans, the Queen's tears, a bromeliad or a member of the pineapple family. The combination of pink bracts and calyx, green ovary and petals, outlined in blue, and the yellow stamens is very striking and a quite unique color combination.
This plant grows well in a 50:50 combination of orchid mix and cactus potting "soil". Every two weeks the entire hanging basket is showered throughly and allowed to drain before rehanging.
Another reliable and easy to grow tropical plants that reliably flowers under this indoor-outdoor regiem is one of the orchid cacti that another blogger has illustrated so nicely. Enjoy.