Olsso is a beef barbecue restaurant in Jongno that serves all-you-can-eat beef grilled over charcoal. Diners can keep ordering multiple cuts of beef, along with yukhoe, doenjang jjigae, and gyelantang. The all-you-can-eat service runs for two hours, the grill is changed often, and a sirloin set is also available at lunch. The sirloin set takes a long time to be set up.