The Four Point Flex hotels are economic options with the brand. You can earn EQN, but you its an earning ratio of 2 nights = 1 EQN.
https://www.marriott.com/marriott-br...points-flex.mi
Not worth it in my opinion, but if you're in a tight crunch to earn EQN and need cheaper stays, the FLEX hotels could be an option.
London also has a Four Point Flex.