The Musical Theatre Guild of Butler will present the comedy “Hats!” from

July 15 to 17 and 22 to 24 in the William A. Lehnerd Performance Hall in Butler Memorial Park.Showtimes are at 8 p.m. Fridays and Saturdays and 3 p.m. Sundays.Tickets are $17 and will be available in advance at May's Music Shoppe, 247 W. Jefferson St. Tickets will also be available at the door, if they have not all been sold in advance.Call 724-287-8243.

SLIPPERY ROCK — The Old Stone House, managed by Slippery Rock University, will host four ghost hunting sessions.The Center for Paranormal Study and Investigation, a local, nonprofit organization will lead the 8:30 to 11:30 p.m. sessions Friday and Aug. 5, Sept. 2 and Oct. 7.Reservations, limited to 15 participants per session, are $10 and may be made by calling 724-738-4964.Participants will learn to use ghost-hunting equipment and will participate in the paranormal investigation.The Old Stone House is at the junction of Routes 8, 173 and 528.

PITTSBURGH — The EQT Pittsburgh Three Rivers Regatta will take place Saturday, Sunday and Monday at Point Park.The all-free 34th annual event features Sandsational building the largest sand sculpture in Pittsburgh, Circus Orange with pyrotechnics and aerial stunt performers, North American Powerboat Championships, and the “Flashes of Freedom” Fireworks Fantasia, produced by New Castle-based Pyrotecnico.In between, there's music, food, a kids' zone, dragon boats, bass fishing, bike stunt shows, and “Anything that Floats.”Hours are loosely noon to 9 p.m. each day. Visit the website www.threeriversregatta.net.Later this summer, the Regatta at Lake Arthur is set for Aug. 7 and 8 at Moraine State Park.

FOXBURG — Allegheny RiverStone Center for the Arts has scheduled August events including:• Ceilidh on the Foxburg Green, 7 p.m. Aug. 19, outside Lincoln Hall, 92 S. Palmer St.• Scottish Festival Day, 9 a.m. to 5 p.m. Aug. 20• Scottish Music Festival Jam, 7 p.m. Aug. 20 in Lincoln Hall• Scottish Music, 2 p.m. Aug. 21, at Foxburg Wine Cellars, 65 Main St.Call 412–867–1816 or visit http://alleghenyriverstone.org.

FRANKLIN — “Seussical the Musical” will be staged July 8, 9, 15, 16 and 17 at the Barrow-Civic Theatre, 1223 Liberty St.Opening night will feature a reception at 6:30 p.m. with catered food and some performers.Tickets are $18 for adults, $16 for senior citizens, and $12 for youths.Tickets can be purchased by calling 814-437-3440.

PITTSBURGH — The Alliance Française hosts Bastille Day, a celebration of the French national holiday, from 6 to 9 p.m. July 14. Festivities include food, art, entertainment and a silent auction.Food will feature French wines and a classic French strolling picnic supper at the Pittsburgh Center for the Arts; a French dessert buffet follows dinner. Musical entertainment by the Steven Vance Trio will play through dinner.Parisian-trained mime performer, Mark Thompson, will also entertain guests throughout the evening along with caricature drawings.Cost is $75 per adult and $35 per child age 12 and younger. Proceeds benefit The Alliance Française de Pittsburgh. Registrations are being taken online at www.afpitt.org or by calling 412-578-2477.