Help me make plans for a group of people ages 16-33!

This plan spawned out of thin air and now I need to find things to do. My cousins are all in town from different places and me and one of my cousins (we’re both locals) are going to take them all out on an adventure tonight (it is 8 of us in total). The og plan was to take them to the arcade but one of the cousins has never ever been to Miami and the other have been here a few times but an arcade just doesn’t make sense. We are thinking of going to Brickell and just walking around and then coming home to play board games but that isn’t very exciting. Any tips and suggestions would be greatly appreciated!