I am from San Francisco, work as a structural engineer, and I enjoy swimming and traveling.
Carl an Clio are very nice people, i got the chance to talk to them and to know them a little in the three days they've staid at my place. I particularly enjoyed the viola music that Clio plaid, my only regret being that their stay was so brief, since i realized they are very nice guys, the kind of people you would like to have around you as friends.
As guests they were very nice as well, clean, communicative and respectful of the house rules. I would certainly recommend them for future hosting.