I have a commuter fleet of 4 bikes, 3 geared and one fixed. I have another bike mainly for long weekend rides. And I have an upright city bike and a 29r mtn. bike. So yes I ride them all but I am considering selling one of my commuters.
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"