I think reinventmyself makes a good point and I agree with her assessment that you can't go wrong, either way. Good luck and have fun!
Is there anything like an indoor botanical garden or something similar that you might all check out? Any sort of outing that allows for the lot of you to focus on another activity as everyone mingles and chats, for instance? Places like that often have a cafe or the like attached, so you might still have the opportunity to get some food together.
Again, best of luck. :)