Bent-Up Cycles in Los Angeles. Really nice people. I dont think they rent, BUT they will let you demo most of their bents in the quiet neighborhood behind the shop. I spent half a day there trying out bents.
The last I knew, Dana at BentupCycles hosted a ride every Saturday morning. Might be an opportunity for a long test ride! A year and a half ago, I did one of those rides - up La Tuna Rd and a circuitous route back. 36 miles on a borrowed Corsa.