cards

Q: Is it okay to play online poker not with real money. Me and my brothers, cousins like to play cards we don't bet just play. Or we shouldn't?

Q: Inshallah, my nikaah is after two months:

1. Is it correct to write or print my brides name on the walima invitation?

2. Can we just write "daughter of ( her father's name)"? 

Q: I would like to know if playing card tricks just as a hobby is allowed in Islam?

Q: Is it permissible to play cards in Islam? If it is not permissible, why is it not permissible?

Q: Is it permissible to give thank you cards and wedding cards to invite people to a wedding in islam?