Diners who visited a restaurant at one of Melbourne’s most-famous nightclubs, as well as an inner-city public pool, last week may have been exposed to measles, health authorities have warned.

A man in his 20s has been diagnosed with the infectious disease, after spending two hours at Colonel Tan's restaurant at Revolver Upstairs in Prahran on Thursday, January 10.

The man visited Colonel Tan's at Revolver Upstairs last Thursday evening. Credit:Rebecca Hallas

He also travelled on the Hurstbridge train line and visited the Prahran Aquatic Centre, Laird Hotel in Abbotsford, Blackhearts and Sparrows bottle shop in North Fitzroy and Hooking Bar and Restaurant in Kew East while infectious.

A spokeswoman for Colonel Tan's said the venue was not at capacity when the man visited the restaurant.