Welcome back, little piggies, from your night of binge eating and sipping. (That is, if you were fortunate enough to do so.) Why not get up, out, and about tonight to work off that meal, hangover with the following:

-- Kristi Yamaguchi Holiday Ice Rink at Embarcadero Center: Our Kristi, our Kristi, why hast thou forsaken us? Alas, although no longer branded with Olympic gold-medal allure, you'll still have a blast at the holiday rink at the tip of the Embarcadero center. Stays open until 10 p.m. at Justin Herman Plaza (next to Four Embarcadero Center across from the Ferry Building) until mid January '08. The hours and prices, according to the Chronicle, are as follows: "ninety-minute sessions, starting every even hour, 10 a.m. to 10 p.m. Sun.-Thurs., until 11:30 p.m. Fri. and Sat. $8 adults, $4.50 seniors and children 10 and younger. Prices are 50 cents more from 6 p.m. Fri. until closing Sun. Skate rental: $3.50. Through Jan. 15. The rink may close for inclement weather or private parties."

-- iPod Dance-Off: In front of the downtown Apple store (not the new one opening up today) there will be a dance off. Beware: dance-offs can be brutal. The "spontaneous" flash mob event starts tonight at 5 p.m. at the Apple Store; free.

-- Biscuits and Gravy: The fifth annual post-Thanksgiving hip hop, Latin, fun, and club classics throw downs is not to be missed. For reals. DJs Vinnie Esparza, Asti Spumanti, and Johnny Deeper man the decks tonight at the yearly club night starting at 10 p.m. at the Elbo Room; free.