Suburbs of Vilnius has plenty of attractions you'll like. For example historical city of Trakai is really worth to go. Take a bus or take part in guided tours which are done there. If you are seeking nightlife, don't worry. There are plenty of bars and clubs where you can party till early morning.
Many clubs also offers live music in weeknights.
International cuisines are well represented in Vilnius. Most of the restaurants are situated in Old Town. Wide range of sport activities you can find as well. Horseback riding, swimming, bowling and even skydiving you can try.