Well, welcome to the rest of the world!
Beside from some more (or less?) posh London and other European Capital restaurants, service charge is not added separately or discretionary in Europe, Asia or Australia/New Zeeland. It's included in the price, beneficial for the guest, for tax reasons, for the waitstaff, with having the former "tips" included in their wage, hence also a ground for sick-leave salary and pensions. Rounding up an odd number when paying cash, can be seen, but most of us use a credit card for restaurant bills, hence no need to round up, as there will be no change.

In another thread, the Wiki shows the state of tipping or not in the world:

http://www.flyertalk.com/forum/trave...ry-region.html