investment clubinˈvestment ˌclub noun [countable] 
a group of people who meet regularly to decide which investments to buy and sell together, with money that they all put into the group: 
O'Hara belongs to an investment club in Detroit.
a group of people who meet regularly to decide which investments to buy and sell together, with money that they all put into the group: O'Hara belongs to an investment club in Detroit.