San Pedro in Belize. It's a 15 minute flight from Belize City, and they might already have direct flights into San Pedro from LA.
Most people drive golf carts and bikes. The town is very rustic and not too far up the coast are luxury resorts.
Mostly couples, but a MGTOW would feel fine. Plenty of good expat dive bars. I like Coco Beach Resort, stay in one of the detached villas.