You tip in Britain just as you do in the United States, though the amounts are lower, generally 12.5% to 15%. You can tip more if service was exceptional. The server is likely to get more if you leave cash (employers can deduct administrative costs if it's left as a service charge or on a credit card). Tip your bartender £1–£2 per round of drinks, depending on the number of drinks, but don’t tip bar staff in pubs—although you can always offer to buy them a drink. In most other cases, rounding up to the nearest pound or 50p is appreciated. For hotel housekeeping, be sure to leave at least £2 per day.