I'm glad you appreciate it.
I found some more for you.

No Going Back by TammyAsh666
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=35135Summary: Takes place before "Crush." A game of Truth or Dare goes horribly wrong when Dawn dares Buffy to visit a certain vampire, doing something she normally never would, but the Slayer can't possibly pass up on a challenge. Complete
Alive or Dead! by Lilachigh
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=19111Summary: Season 6. A poker game leads Buffy and Spike into a very unexpected situation. Complete
Royal Flush by Karbear57
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=6624Summary: Quasi S6; Buffy and Spike bet on a poker game Complete
Slip of the Tongue by Behind Blue Eyes
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=36739Summary: Set in Season 6, during Life Serial. Buffy and Spike are sharing a couple of drinks. How a little drinking game, can bring out the lust between our two favorite characters. Complete
Willow's Dare by vamptasticA
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=1049Summary: The usual group of scoobs minus Dawn, who was staying at a friends and Spike, who, while not really a boniefied Scooby, has been avoiding Buffy and co. since Willow pulled the little poof and brought Buffy back from the beyond. A game of quarters and a dare from a certain witch and Buffy's back in the game! Complete
Then this from a series by Nautibitz that includes Truth or Dare.
Link to the series. Close Enounters
http://spikeluver.com/SpuffyRealm/series.php?seriesid=4Truce Or Dare by NautiBitz
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=28062Summary: Post-'Something Blue', Buffy makes an intriguing statement. Spike suggests a fitting game. Are the Scoobies bored enough to play? Of course they are! (Originally published in 2002. Winner of LLGA's "Best Short Story", "Year's Best Spike Characterization", "Best Comedy/Fluff", and more.) Complete