Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Gyft - Buy Digital and eGift Cards | Free Mobile Gift Card App
Event Hunt - Startups and Tech Events Curated By Locals
TopCashback - TopCashback names itself the UK’s most generous cashback site. They offer cashback on over 5,000 retailers with a variety of payment methods including gift cards, PayPal and bank transfer.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Freebird - Freebird is a cashback and shopping rewards platform that allows anyone to participate at no cost.