Did you tip the bellboy ?   Yes , but I don ’ t think it was enough . He looked disappointed . I gave him three dollars .   That sounds about right to me , fifty cents a bag . If they think you don ’ t know better , they ’ ll try to get more .   It ’ s the same in Balloon . But I definitely think we over-tipped the cab driver . The fare was twenty dollars , and you gave him a five-dollar tip . That ’ s twenty-five percent of the total ! Too much !   I disagree . He was polite and informative , and he drove smoothly . One should reward good service .   I ’ ll sign for dinner and charge it to our room.Let ’ s see.The bill is one hundred dollars . That seems reasonable . How much tip should I leave ? 