There are many places in Portugal where you can get discounts if you are a student. To get it you just need to show your ID and University Card with a photo. Moreover, if you buy the ESNcard you can get many more discounts all around the Europe, Portugal and Coimbra. Get to know more about the discounts you get with the ESNcard here (Coimbra) and here (Portugal).
Also We Have the ESN Coimbra Partnerships Booklet! so you can see our partners, their offers, and terms and conditions!