Catacombs at the Hotel
Boulderado
2115 13th St., Boulder
This past March, bassist Mark Diamond and violinist Lionel Young celebrated their second anniversary as co-hosts of what has become one of the area's most popular and well-attended blues jams; the two are joined each Monday night at the Catacombs by keyboardist James Torres and drummer Tony Black. Sponsored by Robb's Music and the Colorado Blues Society, the jam has a reputation for quality as well as longevity. It's also known for a few firm rules: The music starts at nine o'clock sharp, and as Young likes to stress, the most important rule is, "If you suck, do not come here and expect to play."