Smoking Pug has now moved to Lang Suan

I used to like Mango Tree but haven't been for years, it became very touristy and food fairly bland, these days I prefer Ruen Urai behind the Rose Hotel for Thai food (have some good set menus for groups) or Than Ying in a nice converted house in Soi Pramuan off Silom

for Thai seafood Somboon if you don't mind the plastic tables at the Surawong branch (sorry it is a chain, and I think the other branches are a bit more upmarket decor) or even Laem Charoen Seafood in Silom Complex (also a chain!)

if you want to try some great Lebanese and Indian then Al Saray in Silom or for French then Brasserie 9 has now moved from Asiatique to a much more convenient location in Soi Pipat with lots of parking, or for Italian Opus in Soi Pan off SIlom

you didn't specify a budget so some of these may be a bit beyond your idea of a "nice family meal" but it depends on how/what you order - particularly wine/drinks and what ambience you are looking for

bkkguy