Whenever I ride with my friends (a small group of ladies) I always carry my cable lock, never knowing where we are going to have lunch. None of the other ladies carries a lock. Sometimes we have to leave our bikes out of sight to go inside to eat. I REFUSE to leave my bike unlocked and out of sight. Every once in awhile one of the ladies will ask to share my lock, which I will do, if it can stretch that far. I really don't feel like I should be the only one to carry a lock. I even gave one of the ladies a cable lock for Christmas and she still will not carry a lock. This same lady always makes the comment of "oh you don't need to lock your bike, no one will take it". Well my bike cost three times as much as hers. The next time someone ask if they can share my lock should I just refuse and give an excuse like "it's not long enough for two bikes".