One thing I haven't seen mentioned yet, is that if someone is forced to use an NFC capable smart phone then they'll be forced to agree to third parties' terms and conditions of use, i.e. one or possibly all of the following: the smart phone manufacturer, Apple or Google app store, the Apple or Google wallet app, (possibly something else I've missed). Some people may not want any of this, but my main point is that essentially the only contract to gain entry should be between you and the club, not being forced to enter into contracts with third parties. Few if any people will care about this but I think it's still a valid point. Along the same lines, what if for example Apple lock you out of your account and you cannot access your Apple Wallet with your e-ticket in it? Another possible reason you can't use your phone to add to the list.
Just give people the choice.