Albuquerque Little Theatre is a durable local stage close to Old Town, with a history that reaches back far enough to make it part of the city's cultural fabric. The programming is usually accessible theatre: plays, musicals, and community productions rather than experimental work.
It makes sense as an evening plan if you are staying nearby or want a quieter alternative to bars and restaurants. Check the calendar first; the building is interesting, but the real reason to go is a performance.