Just talked to one of the board member at Nishu tonight to get you an answer. First thing that is needed is a permit from G & F for a crossbow. 2nd you will need to supply your own target. The main reason on this has to deal with parks and rec as Nishu leases the building and land from Parks and Rec. Parks and rec has an issue with crossbows being used on their targets. Parks and rec rules and Nishu just has to follow them. If you need anything else let me know. Probably not the answer you wanted but thats what I got for ya.