Food: (this is ranked in my order of preference):
Edamame- if it is open-is up there with the best Japanese I've had in the UK (http://www.edamame.freeserve.co.uk/)
Random salad stuff- Alpha Bar in the covered market on Friday and Saturday for delicious but slightly pricey salad boxes...
The Trout Inn is pleasant on a sunny day if you can find a table outside- and the walk up Port Meadow to it is lovely anyways- though again a little pricey.
Mission Burritos are quite cheap and good.
Beer wise- you're not really short of pubs- but London prices are the standard...
I'd also recommend the Three Goats Heads for slightly lower prices...
You should also probably go punting if you've not been before.
Coffee:
Bikezone/Zappi's is pretty good.
Food: (this is ranked in my order of preference):
Edamame- if it is open-is up there with the best Japanese I've had in the UK (http://www.edamame.freeserve.co.uk/)
Random salad stuff- Alpha Bar in the covered market on Friday and Saturday for delicious but slightly pricey salad boxes...
G+D's Ice Cream is an absolute must.
Atomic Burger is amazing and quite cheap. http://atomicburger.co.uk/
The Trout Inn is pleasant on a sunny day if you can find a table outside- and the walk up Port Meadow to it is lovely anyways- though again a little pricey.
Mission Burritos are quite cheap and good.
Beer wise- you're not really short of pubs- but London prices are the standard...
I'd also recommend the Three Goats Heads for slightly lower prices...
You should also probably go punting if you've not been before.
Hope that helps...