Comment Key pouch (Score 1) 763
The solution is ancient.
You need a small pouch with a hole in the bottom.
Thread your chain/strap through the hole.
Fasten the end of the chain/strap that is on the "outside" of the pouch to your pants.
Fasten the end of the chain/strap that is on the "inside" of the pouch to your keys.
Pull on the chain/strap and the keys zip inside the pouch and will not wear your pockets down.
When you are about to open a lock just pull on the longest key to extract the keys from the pouch.
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Making such a pouch is trivial for the crafty geek, or you can just go to your local leather-workern and get one made for you.
http://www.valleycountry.com.au/catalogue/country_lifestyle/accessories/key_rings/leather_key_pouch