Add "LinkedIn" as an option in the RSVP pop-up window.
I'd like to be able to link my RSVPs directly to my LinkedIn acccount, just like you can currently do for Facebook and Twitter.
Would like to "share" to LinkedIn since some of these groups are industry/professional related.
Highlight Linkedin connections (or second-degree connections) participating in a meetup we are attending (or just browsing)? Like you already do for Facebook (e.g. You both know XYZ).
Yair Devonfb commented
For my professional/career related meetups, linked in is much more appropriate. FB is mostly for my friends/personal life and therefore only really good for hobbys & some alumni meetups.