Bethan sipped the same local drink: a powerful mix of honey, fresh limes and vodka known locally as "Dawa", or "medicine".She kept one eye on her date - a 20-year-old playing pool, a red bandana tying back dreadlocks and new-looking sports shoes on his feet.
They go dining at fine restaurants, then dancing, and back to expensive hotel rooms overlooking the coast.
He looked up and came to join her at the table, kissing her, then collecting more coins for the pool game.
"JUST UNWHOLESOME" Grieves-Cook and many hotel managers say they are doing all they can to discourage the practice of older women picking up local boys, arguing it is far from the type of tourism they want to encourage in the east African nation.
Although condom use can only be guessed at, Julia Davidson, an academic at Nottingham University who writes on sex tourism, said that in the course of her research she had met women who shunned condoms -- finding them too "businesslike" for their exotic fantasies.
The white beaches of the Indian Ocean coast stretched before the friends as they both walked arm-in-arm with young African men, Allie resting her white haired-head on the shoulder of her companion, a six-foot-four 23-year-old from the Maasai tribe.