Awesome story! Just maybe a little advice, make the names a little more different than Lisa and Linda. I got a little lost as to who was who but I don't think it took away from the story all that much;)
A lot of times places I work at don't have bathrooms or they're ripped apart so common for me is drains in some rooms and buckets, don't wanna destroy anything. Then there's times when you get to have more fun;)
The strangest place for me would be underneath my ex-gfs deck. Had to go and couldn't go inside so I had to make do! She almost caught me but I got away with it:)