Whitman's dining hall is combined with Butler's so that's usually the most convenient dining hall to hit. Some people like to talk down on Whitman food, but personally I think it's good enough, and if you're lucky enough they'll even have a make-your-own-burrito station for the week (only for lunch not dinner since budget cuts💔). You're sure to run into at least someone you know so grab food and catch up with someone for a bit before resuming your journey to class. First though, since you've just had a nice hearty meal, you might wanna work it off somewhere.
You could get some steps in and take a stroll around the Museum and appreciate all the works in there.
Or, you could side track a bit and take the bus to Meadows and maybe get a quick workout in at a usually empty gym.
If you think some fresh air would be nicer, you could also make your way down to Forbes Lawn for a bit.