For the Failtopia ships you support, what sort of date ideas do you see each pairing doing?
"Support" is basically all of them, so I'll just do the ones I actually ship, since that's what I assume you meant:
Eribo don't go on dates that often, what with Bo still having strong issues with socialising, and they usually keep it simple when they do go out, like a restaurant, or a quiet long walk. The latter is especially nice, since the reason for these dates is usually to take a break from The Incident's craziness (also, usually suggested by Erica).
Lanchi, on the direct other hand, can almost never let a date go quietly. Chi's made sure to bring her girlfriend to every possible outing she can, even the boring ones, and every single one has resulted in a night to remember. This does mean they also don't go out particularly often, Lanc isn't always in the mood for the insanity.
Marion stick to what they do in canon, get some drinks at a café and argue about whatever's on their mind. Orion used to go all-out whenever he took his wife out on a date, not having much else to do with his money, so he appreciates a more low-key experience when he's with Mar.
Smuk rarely takes either of his partners out to dinner, he much prefers to cook it himself, and not wanting him to be left out of the experience, Rose and Bob don't go alone either. At least, not often. All three of them enjoy the simpler Outings, with stargazing being a particular favourite of Rose's (when she feels up for it).
All the other ships I'm a fan of, I don't think would actually go on dates, either because they're too young, or they probably never make themselves official.