Greensburg -- The Harlan Gallery at Seton Hill University is hosting a student exhibit through Sept. 19. Call 724-830-1069.

Turtle Creek -- Calvary United Church of Christ, 125 Shaw Ave., will sponsor the following. Information: 412-823-4347.

• Opportunity Shop, second-hand clothing, 9:30 a.m. to noon today and every Thursday and 12:30 to 2:30 p.m. Sept. 11 and every second Saturday. Closed on Sept. 23 and 30.

• Spaghetti supper, 4 to 6:30 p.m. next Thursday. Cost: $6.50, takeouts available.

Derry Township -- The state Department of Conservation and Natural Resources will hold an introduction to kayaking from 1 to 2:30 p.m. Saturday. The cost is $8. Registration: 724-668-2939.

Greensburg -- The Westmoreland Museum of American Art, 221 N. Main St., will sponsor the following "Imagine with Me!" art classes for pre-school children from 11 a.m. to 12:30 p.m as part of its Second Saturday Studio series. The cost is $20 for one or $32 for both, and registration is required. Information: 724-837-1500 ext. 10.

• "Crazy Quilts," Sept. 11.

• "My Favorite Things," including self-portrait, Nov. 13.

Swissvale -- The Swissvale Rotary will hold a corn roast from 4 to 7 p.m. next Thursday in the church hall of Swissvale Presbyterian Church, 1825 Monongahela Ave. The cost is $7, $4 for children. Information: 412-371-3333.

Greensburg -- The Westmoreland Museum of American Art, 221 N. Main St., will sponsor a Gallery Talk, "Rooted in Tradition: Art Quilts from the Rocky Mountain Quilt Museum," at 7 p.m. next Thursday. Call 724-837-1500 ext. 10.

Unity -- The Small Business Development Center at Saint Vincent College, 300 Fraser Purchase Road, will sponsor "The First Step to Small Business Success" from 6 to 8 p.m. next Thursday. The cost is $15, and includes materials. Registration required; call 724-537-4572.

North Huntingdon -- The Norwin Chamber of Commerce will hold a business mixer from 4:30 to 6:30 p.m. Wednesday at CSDI (Creative Stitches by Dina), 11380 Lincoln Highway. Information: 724-863-0888.

Churchill -- Edgewood Country Club, 100 Churchill Road, will hold a bridal fair from 6:30 to 9:30 p.m. Sept. 29. Interested vendors should contact the club by Friday; to attend, Sept. 22. Reservations: 412-823-7300.

Derry Township -- The state Department of Conservation and Natural Resources will sponsor the following nature programs in Keystone State Park, 1150 Keystone Park Road. Information: 724-668-2566.

• "Exploring Nature by Bike," 2 to 3 p.m. Friday.

• Evening canoe tour, 6 to 8 p.m. Friday.

• GPS basics, 2 to 3 p.m. Saturday.

• "Afraid of the Dark?" evening hike, 7 to 9 p.m. Saturday.

• "Summer Blooms" hike, 2 to 3 p.m. Sunday.

Monroeville -- Cassie's Mutt Festival will take place from 11:30 a.m. to 6 p.m. Sept. 19 in Community Park East, 2336 Tilbrook Road. Included will be judging contests for dogs in children's and adult's categories, displays by vendors, nail trimming, face painting and more.

The festival is also accepting applications for vendors. The deadline is Sept. 11.

Information: 412-373-1690 or 724-863-1569.

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