I haven't managed to try this place out yet, but look at the deal Jacketz is offering: students come in together and receive a 25% discount.

What is Jacketz? According to the ad, they are the first baked potato shop in Leiden. They're positive about their idea taking off - and are counting on groups of four or more students to come in and try out the spuds.

Jacketz is located near the market in Leiden, on the Maarsmansteeg 10. It is open every daily from 12pm to 10pm. Check it out! With that kind of discount, what do you have to lose?