Keys on blue USB keychain near Michigan Theater

I found a set of keys this afternoon around 3:15pm on Liberty Street, right by the Michigan Theater in downtown Ann Arbor. The ring has two silver house keys, a black car key fob, and a bright blue USB flash drive labeled 'DataSafe 16GB' in a metal casing, plus a red enamel paw-print tag attached. They’re a bit scratched but otherwise in decent condition. If you recognize them, I'm glad to hand them back at the Michigan Theater box office or we can meet nearby; I’d be happy to return them to their owner.