I have three bikes. My two commuters have kickstands by the rear wheel. My old road bike has none. I lean it against things or against a curb, I will flip it over and rest it on the seat and bars., or sometimes lay it down, but not on the "drive side" so the rear deraillier cage won't be pushed out of alignment.

If you must lean your bike, please be mindful of other's possessions and property, i.e. cars, windows, decorative railings, murals, etc.