Saturday, Oct. 27: Luxury Classic Car Show; noon-4 p.m., spectators free; Main St./Rte. 25A, Cold Spring Harbor; info: www.howl-ween.com . . .
Saturday, Oct. 27-Sunday, Oct. 28: NY Region Sports Car Club of America Autocross to benefit United Behind Chelsea charity; 8 a.m.-4 p.m. both days, members $55 single day or $90 both days, non-members $70 single day or $105 both days, spectators free; Nassau Coliseum, lot 8, Hempstead Tpke., Uniondale; info: www.nyr-scca.org . . .
Sunday, Oct. 28: Annual Mustang Roundup; breakfast 6 a.m.-8 a.m.,cars leave 8:15 a.m., The Garage restaurant, 170 Bridge Rd., Islandia for drive to ‘Son of Monster Mash’ show (see below), Farmingville; info: 631-968-9112 . . .
1st Annual Halloween ‘Car Fest’ to benefit Wounded Warrior Project; 11 a.m.-4 p.m.; Grill 454, 88 Veterans Memorial Hwy., Commack; info: www.facebook.com/grill454 . . .
2nd Annual Motor Parkway ‘Sunday Drive’ to Lake Ronkonkoma; assemble 8 a.m., Cunningham Park, 196th Place & Union Tpke., Fresh Meadows, Queens & finish at Ronkonkoma Beach . . .
‘Son of the Monster Mash’ Car & Motorcycle Show, Swap Meet & Flea Market to benefit the blind & hearing-impaired; 8 a.m.-4 p.m.; Pennysaver Amphitheater at Bald Hill, S. Bicycle Path, Farmingville.