"The exchange rate has been the biggest topic of conversation since we got here," said Jeff Skipper, 50, an electrician. Register now for FREE unlimited access to Reuters.com Register"Everything is pretty expensive for us," said Valerie, a 47-year old university administrator. read moreSterling hit a record low of $1.0327 on Monday, having plummeted 20% against the dollar this year. "Now it's one dollar to the pound…It's really hit us," said Colin Taylor, a retired telecoms engineer from the United Kingdom who was also visiting San Francisco with his wife. The dollar index, which measures the greenback against a currency basket, hit a fresh 20-year high of 114.78 on Wednesday.

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