S T R E T C H your horizons at 21c Museum Hotel Lexington’s biweekly Saturday Series. Flex those creative muscles as you work through a variety of barre poses, then hit the bar at Lockbox for a mimosa. Sessions are just $10 at the door and are led by certified barre instructors from Elle Fitness featuring BarreAmped. Price includes mimosa. Bring your own mat. Cash only.