Refer me
BNI Chestnut Hill, an organization that aims to help people increase business through referral marketing, is having an open house. Business owners looking to join a team and meet other like-minded professionals are invited to attend. Wednesday, 7 to 8:30 a.m., Keller Williams, 1151 Walnut St., Newton. Free.
Startupalooza
Entrepreneurs are invited to come pitch before a team of investors at Summer Startupalooza, while the audience listens in on what VCs are looking for. All ideas are welcome and the event features a food and networking session before the pitches start. Wednesday, 5 to 8:30 p.m., McCarter & English, 265 Franklin St., Boston. $15 to $45.
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Education for all
Come out for the launch of Mass Insight Education's Young Professionals 4Ed network, which supports increasing access to high-quality education for students. Attendees are invited to come network with education professionals over drinks and appetizers, and are encouraged to bring business cards. Thursday, 5:30 to 8:30 p.m., Boston Beer Works, 112 Canal St., Boston. Free.
Twitter tips
All business professionals could benefit from having a better understanding of Twitter. In this class, attendees will learn how to use the social media site to increase online awareness of their businesses and find new clients. Thursday, 6:30 to 8 p.m., General Assembly Boston, 51 Melcher St., Boston. Free.
Talk travel
Young Travel Professionals Boston, a networking group focused on the younger generation of travel and hospitality professionals, is having its last event of the summer. Come out for good conversation and lawn games. Drinks and food will be served. Thursday, 6:30 to 9:30 p.m., The Lawn on D, 420 D St., Boston. Free.
Events of note? E-mail us at agenda@globe.com.