diyatha uyana is good for a evening walk. Marine drive ekke kekaitya panduru is bit dodgy lol or taken most of the time, its like staying in the queue to get into that pandura
Machan I and my grl frnd always visit to race course ground colombo 7. It's a really nice place for a couple, if u want to get food there is a restaurant or mac donaldz .
Or else you can go to choco love, mount lavania beach