I've gone to both locations either
Being a client of CMJ for close to 10 years, it happen maybe twice that I ran to another client. The 1st time, I confess, I was the guilty one: I didn't wait for the provider to look before and I went out of the room by myself. At the same time, another door open and the guy came out at the same time. We look at each other, we both laugh and went back in our respective room. The girl was embarrass, but that was funny. No arm.
It happen a second time, I was already in the corridor and both a provider and a client came out of the room. There was a little "oupss" from them but that's it.
Beside those two events, it never happen.
At BC, I just don't like the bar up front. Even if there is a curtain to separate the bar from the front desk, it's too close and we can here the clients talking with the providers. I don't like that... been there only 3 times, the 3 times there clients at the bar.