Looking for an upright bass to jam/ busk outside - jazz / modern pop (Denver)

hi - looking for some people who might want to get together and play some music outside while the weather permits. I am a piano player and I have a drummer who plays a suitcase kit - though would be open to someone looking to play percussion too. Any horns or bass players that want to maybe learn some tunes and do some playing ? Looking to play some jazz standards or some melodies that people might recognize and just have a little fun with them. Would love if a singer wanted to join and would love to turn this into some inside gig opportunities for the future and coming winter