I've managed to lose my locker key and there's no master!

Just this morning i managed to lose all of my keys. They were on a keyring which is now gone. One of the keys was for my Golf Club locker. The problem i've got is that there is no master. I was asked to get a master key cut when they gave me the locker. I did. But the bloody thing didn't work. This was about six weeks ago. I never got round to getting another done.

What can i do? Should i get a local locksmith to meet me at the golf club and see what he can do?

Any advice welcome.