Go over to slater rec/compassion center and get some goodies, go to providence place mall and shop/browse/look around, walk along the water fires walkway (I dont' think they light them in march?), eat at tortilla flats if you wander up that far, or at union station brewery if you stay downtown. You could easily head over to Trinity brewhouse for lunch/linner/dinner, and have some of the beer they brew onsite or just some food if you aren't into beer. Trinity Rep is across the street but you'd have to look and see what shows are going on. Also Providence Performing arts is right around the corner if they have any shows going on then. All kind of places to eat look on Yelp. RI is in the top 10 food destinations (or was) which is the only reason I know all of this lol.