Powerpoint 'streaming'

[Mashwort]

So not a direct business question but figure this would be the best place for a powerpoint question

Giving a speech at a wedding next week. Had planned to utilise powerpoint to display suitably embarrassing photos. The venue doesn't have the space / facilities for a projector screen. Then I thought pretty much everyone there will have some form of smart phone and wondered if i can utilise that. Is there a solution that will easily allow me to 'stream' the powerpoint presentation to the other guests on their phones?
Want to avoid them having to download anything, ideally give them a URL and a password type of thing. Have used similar stuff at conferences for Q&A type activities but not for powerpoint.
Any suggestions gratefully received

Thanks
Mike