TheFork users who ate in Poissy have said really good things about Le Maharaja, The Little Italy and Osaka. Maybe you should give them a try!
Some of the more popular cheap eats restaurants where you can go with your friends in Poissy according to TheFork users include:
Le Maharaja, with a 8.3 rating
The Little Italy, with a 9.2 rating
Crêperie Louis, with a 9 rating