Steve Rennekamp, left, and Don Darragh drew 100 people to EnergySwing Windows' first barbecue.
Bringing past customers together for a relaxed social event helps boost your repeat and referral business.
Alure Home Improvement throws a quarterly party tied to its referral reward program, which sends customers to Cancun.
The August picnic thrown by Swimme and Son results in an immediate up-tick in repeat business.
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