Usually I send them to restaurants or bars (including karaoke, so they can sing in duets). I have also one lot that works for me as cinema, I like to send them there (I even manage to set them up to sit next to each others so it really looks like a date in cinema :sweat_smile: )
I tried with other lots too, for example I have one lot that works as amusement park - but it ended up they didn't really spend time together... the same during festivals... of course if I make them talking to each other, then yes, but I mean some other activities that could be done by both.