Some of them are free and others have a password.

my question is when they have a password and it's 10 digits. Is that WEP 128bit?

If so what do you pad with when your client wants 13 characters?

Probably what they are giving you is a pass-phrase, not a key. But then on the other hand, that is just speculation since you have not provided sufficient details with your OP. Was the key given to you a phrase, or was it a mixed-bag of hex characters (0 thru 9, A thru F)?

I'll be surprised if Coffee World uses WEP. If so, then up to them. WEP is considered a weak encryption scheme that purportedly is easy to crack. Coffee World, and anyone else for that matter that relies on WiFi, should consider using 128-bit WPA.

Btw, in case you are unaware, one hex character is 4 bits long. Thus it would take 32 hex characters to make up a 128-bit encryption, 16 hex characters for 64-bit encryption, etc.