Employee Engagement Activities suggestions which can be organised within office on Fridays

I have recently joined a start up company and I am responsible for taking care of Employee Engagement Activities.
Kindly let me have a few suggestions for activities which can be organised within office on Fridays specially so that employees can have fun at work. It will be a great help for me.
P.S. The company does not want to spend too much on these activities.

The entire team can play cards, monopoly, carrom or even dumb charades.
You can experiment with role playing games in which employee will have to play other's character just for fun. Moreover, on Friday entire team can order lunch from particular restaurant, etc.

Thanks for your reply! Will try to arrange this on Fridays.