"MIT's Marriott code 363006 is a university institutional code. No FlyerTalk thread discusses MIT verification incidents. University codes at Marriott are used primarily for conference and research travel — a use pattern hotels accommodate with minimal scrutiny. MIT has strong presence near Boston (Kendall Square), where Marriott properties are plentiful and familiar with academic corporate rates. No verification-denial case documented. University codes are among the lowest-enforcement categories across all major hotel brands."

"lol, my front desk managers *hated* any time I asked them to cover AYS. They’d go out to the desk and help no problem, but I always got some kind of attitude asking them to hop on the phone for my break. I worked at a ~650 room property and was regularly scheduled by myself for AYS second shift."

"FlyerTalk community specifically notes the MMM code as "the go-to code for the Minneapolis/St. Paul area, described as extremely reliable at local Courtyard and Residence Inn properties, with a low risk rating." One user documented using an IBM rate for 14 years at 80-100+ nights annually and "never once being asked for an ID." Another stayed 500+ nights and was never asked. The 3M code is regionally well-known near 3M's Minnesota HQ."