A new study says Millennials are pretty bad at tipping. About two-thirds of millennials tip below the 20 percent suggested tip at a restaurant and what's worse is about 10 percent don't leave a tip at all when eating out!
A good rule of thumb is if you can't tip then don't eat out. If you don't know about how much to tip or where then learn! If the service is really good I tip 20%, which is about $2 for every $10 on a bill.