You'd think Janeway would've gotten plenty of chances to officiate a marriage being Voyager was initially supposed to be a generational ship.
As for Picard hitting on Ro? Don't see it. Any innocent comment can be taken out of context.
RIKER: I'm really not very good.
PICARD: It doesn't matter... as long as you enjoy it.
RIKER: Why not?
PICARD: Excellent. Fourteen hundred hours, then.
So yeah, Picard and Riker were flirting then arranging a date! OMG!