Possible for an outsider to fake being Ismaili and sneak into jamatkhana?

So say I show up to a jamatkhana and wave to people with a cheery "Ya Ali Madad." Think they'd buy it? (Not a deshi, but maybe I could pass as a Sarikoli or something.) Would it help if I asked for the mukhi so I could pay dasond? Should I memorize a few prayers? What might give me away, and how could I make it all convincing? Not planning anything sinister, just want some deedar.