Black-and-yellow taxis (with a green roof-light on when available for hire) are inexpensive, plentiful and well worth using, especially late at night. There's a minimum charge of €1.80 (€2 evenings, weekends and holidays) and after that it's around €0.70 per kilometre. But taxis won't take more than four people and charge extra for baggage and on public holidays, for picking up from Sants and for a multitude of other things. Asking for a receipt ( rebut in Catalan, recibo in Castilian) should ensure that the price is fair. Cabs can be called on the following numbers: tel 934 902 222; tel 934 331 020; tel 933 003 811; tel 933 577 755; tel 933 199 268; and tel 933 215 700.