The Trax (our tram) passes through Campus close to both the Guest House and the math department. It is an efficient way to get to downtown, if you do not want to walk there. (A good way to estimate distances is to remember that an increment of 100 in street numbers corresponds to about a sixth of a mile.) Buses are also a good way to get around, though the closest bus stop to the Guest House is a few minutes walk away.
The maps below are from the math department. Here is a map from the Guest House to the math department.
Places near campus:
A bit farther (about 10-15min walk), there is a nice deli: Cucina Deli (map)
And a bit farther (20min walk), a nice Thai place: Sawadee (map)
Downtown, there are many restaurants. For example, ones that are along Tranx line:
Other places: