Kepa is a wonderful, easy-going hostess and the space she has designed for her guests is very well thought out and comfortable.
For those who don't know Potrero Hill, it's a real neighborhood - cross section of all types and its 'Main St' (18th St. actually) with some fun dining spots (along with a great wine store, baked foods shop & bookstore) is just 2 blocks from Kepas's house.
A car is convenient to have but I understand the public transport is nearby to get you to wherever you want to go. And Kepa would be very helpful if you need to know where to go & how to go. Enjoy!