Not long ago I started hearing rumors about Costco. I was told that there was one here in Beirut, that it stocked the same kinds of things as Costco in the US and that they even had the Walmart off-brand merchandise.
It's not as huge or warehouse-like as it's American counterpart. In my case that's a good thing since I have mini anxiety attacks in huge stores. This is where Costco is, just south of Beirut:
The shop is between the Golf Club and TSC Jnah. If you're coming from Beirut, you'll want to get off the airport highway near TSC so you don't overshoot your target.
They're open from 9 AM to 8 PM Monday-Saturday, and they're open Sunday too, 10 AM to . . . I've forgotten. But then, their phone number is on the sign and if you really need to know you could always call and ask.