For me, Patra has nothing to envy from other cities, it really provides everything. The streets are full with young people and students, mostly because of the University of Patra. In fact, I have a friend who studies there.
Many coffee shops, restaurants and bars and a very active nightlife, make Patra a everyday party. Many of the above cafes and restaurants lay to the main city square and along the port.
I've visited Patra twice. First time, it was during summer, second, during the famous Patra Carnival. That Carnival is the most famous in Greece, with lots of people visiting the city from all over the country.
You can never imagine what's happening in Patra during the Carnival, if you don't live this experience! The carnival activities and events take place every year, around 2 months before Easter and for some weeks there are everyday activities for children and adults. But what's happening at the last weekend of the carnival is really unbelievable! These people are crazy, I tell you! A huge parade with floats and statues and thousants of people dress up and lots of drinking and party! The last Sunday of the carnival is the most famous and most crowdy. I would advice you, not to miss it!