In case you haven't had enough vodka at the wedding (highly unlikely!), you should definitely head to one of the Pijalnias. Stylised as communist era bars, they serve dangerously cheap (1 EUR) beer and vodka, and equally dangerously cheap (2 EUR) and super tasty, albeit slightly on the fat-rich side, Polish tapas.
Less than a 10 minute tram ride from the centre (take no. 16 from Wrocławska to Baraniaka) is the Malta Lake. If you're tired of the city, you can take a stroll around the artificially created lake, where rowing championships are held regularly, and enjoy the nature.
If you want to chill in the nature, sunbathe and have a dip in the lake to wash off the wedding hangover, Strzeszyńskie lake is one of the local hot spots. Public bus 195 from Ogrody (10 minutes by tram from the old town) will get you there in less than 20 minutes.