Try local Meetups and local chapters of Startup Grind and Founder Institute. Many of the ones I attend here in Orange County start with pitches from the floor, and there are often several events a week.

Bear in mind that all investors are looking to eliminate the following so make sure you address all of them proactively:

1) Market risk
2) Product risk
3) Execution risk

These typically map to your deck slides as follows:

Market Risk
• Problem
• Solution
• Market Size
Product Risk
• Product
• Competition
• Competitive Advantages
Execution Risk
• Team
• Business Model
• Go to Market
• Traction
• Financials
• Funding